{
 "slug": "ryerson-commercial-street-1911",
 "object": {
  "schema": "nephos.object-evidence.v1",
  "slug": "ryerson-commercial-street-1911",
  "artist": "Margery Austen Ryerson",
  "title": "Commercial Street, Provincetown",
  "holder": "Provincetown Art Association and Museum",
  "object_id": "3282.058.Pa25",
  "accession_group": "3282",
  "catalogue_year": 1911,
  "medium": "Oil on panel",
  "dimensions_inches": {
   "height": 12,
   "width": 15
  },
  "credit": "Gift of the Helen and Napi Van Dereck Estate, 2025",
  "source_key": "paam",
  "date_quote": "Date made: 1911",
  "biography_quote": "In 1911, Ryerson began spending summers on Cape Cod.",
  "biography_source_key": "nysm-text",
  "biography_locator": "Karen E. Quinn, Margery Ryerson: Art Is Contagious (2025), printed p. 11 / PDF p. 17",
  "signature_location": "Back",
  "signature_transcription": null,
  "signature_transcription_reason": "not_transcribed_in_online_record",
  "painted_day": null,
  "painted_day_reason": "catalogue_year_only_no_object_specific_dated_testimony_found",
  "depicted_season": null,
  "depicted_season_reason": "no_documented_season; Nephos reads a leafy warm-season scene from the press reproduction, separately attributed in revision.visual_reading",
  "working_method": null,
  "working_method_reason": "no_verified_on_site_or_studio_history_for_this_panel",
  "sky_description": null,
  "sky_description_reason": "museum_description_not_located; Nephos visual reading now supplied separately with capture_id",
  "artist_changes": null,
  "artist_changes_reason": "no_verified_comparative_sketch_or_artist_statement_for_this_panel",
  "image": null,
  "image_reason": "public_domain_or_open_licence_not_established",
  "precise_viewpoint": null,
  "precise_viewpoint_reason": "title_names_street_but_no_document_identifies_viewpoint"
 },
 "window": {
  "start": "1911-01-01",
  "end": "1911-12-31",
  "basis": "PAAM catalogue year; not a dated fieldwork interval or a date for the depicted sky."
 },
 "summer_window": {
  "start": "1911-06-01",
  "end": "1911-08-31",
  "basis": "Conventional June–August context for the first Cape Cod summer in Quinn’s biography; not documented arrival, departure or execution dates."
 },
 "station": {
  "id": "USC00196676",
  "name": "Provincetown (GHCN-Daily: Provincetown 3 NW)",
  "lat": 42.083333,
  "lon": -70.233333,
  "historical_metadata_date": "1911-07-01",
  "position_precision": "whole arcminutes",
  "elevation_m": 3.0,
  "distance_km": 5.2,
  "distance_to": "Provincetown Town Hall, 260 Commercial Street; not the unidentified painting viewpoint",
  "observation_hour": null,
  "observation_hour_reason": "not_established_from_checked_sources",
  "years": [
   1893,
   1958
  ]
 },
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   "date": "1911-12-25",
   "TMAX": {
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   "date": "1911-12-27",
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 ],
 "revision": {
  "schema": "nephos.ryerson-revision-evidence.v1",
  "reviewed_at": "2026-10-08",
  "review": "Solo AI visual transcription checked against downloaded scans; not an independent human review. Cloud figures only: fog and other superscripts remain on scans and are not reclassified. Rechecked all 184 cloud cells against scans; monthly means agree after correcting June 10 AM/PM and August 7/13 PM. July–August morning count unchanged.",
  "visual_reading": {
   "attribution": "Nephos’s reading of the picture, not a museum statement",
   "capture_id": "sha256:b311f86b1603116b343f718a7cd581d44bf64006ebde334f0b0557a8f7c5f1e6",
   "source": "press-image",
   "identity_basis": "The press caption matches PAAM artist, title, 1911 date, oil on panel and 12 × 15 inch dimensions; not an accession-linked PAAM digital master.",
   "reading": "A sunlit, apparently dry street in a leafy season, plausibly summer.",
   "reasons": [
    "Pale façades face the light while broad blue-violet shadows cross the road.",
    "Blue sky is visible above the roofs; the small patch does not establish a cloudless hemisphere.",
    "Green foliage and pale clothes with brimmed hats support a warm-season association.",
    "The road reads as matte rather than puddled or reflective; this is a weaker cue than the cast shadows."
   ],
   "limits": "The image supplies neither a date nor air temperature. Light clothing does not measure heat. The reproduction is not colour-calibrated. Summer is an interpretation supported by biography, not a documented month.",
   "publication_image": null,
   "publication_image_reason": "No open reproduction licence established; cached for expressly requested inspection only."
  },
  "school": {
   "name": "Cape Cod School of Art",
   "director": "Charles W. Hawthorne",
   "opening": "1911-07-01",
   "closing": "1911-09-01",
   "source": "school",
   "locator": "Education Report 1911, Table 2, printed p. 1169, row 150; PDF p. 45. Read against column headers on p. 1168. Session of 1911 columns, not probable 1912 dates.",
   "course_quote": "Painting from landscape, still life, and the figure—indoors and out.",
   "course_locator": "printed p. 1141 / PDF p. 17",
   "arrival_day": null,
   "arrival_reason": "Quinn establishes first Cape Cod summer in 1911; exact arrival/departure not located in checked biography or searchable History Project material."
  },
  "daily_cloud": [
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    "date": "1911-06-01",
    "cloud_8am_tenths": 5,
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    "source": "bluehill-p107"
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    "source": "bluehill-p109"
   },
   {
    "date": "1911-08-30",
    "cloud_8am_tenths": 10,
    "cloud_8pm_tenths": 10,
    "source": "bluehill-p109"
   },
   {
    "date": "1911-08-31",
    "cloud_8am_tenths": 10,
    "cloud_8pm_tenths": 10,
    "source": "bluehill-p109"
   }
  ],
  "monthly_light": [
   {
    "month": 6,
    "bright_sunshine_hours": 222.0,
    "bright_sunshine_percent": 52,
    "clear_days": 6,
    "cloudy_days": 10,
    "sunshine_source": "bluehill-p116",
    "cloud_class_source": "bluehill-p115",
    "printed_mean_cloud_8am_tenths": 6.0,
    "printed_mean_cloud_8pm_tenths": 5.7,
    "cloud_mean_source": "bluehill-p107"
   },
   {
    "month": 7,
    "bright_sunshine_hours": 278.0,
    "bright_sunshine_percent": 62,
    "clear_days": 9,
    "cloudy_days": 7,
    "sunshine_source": "bluehill-p116",
    "cloud_class_source": "bluehill-p115",
    "printed_mean_cloud_8am_tenths": 4.2,
    "printed_mean_cloud_8pm_tenths": 5.4,
    "cloud_mean_source": "bluehill-p108"
   },
   {
    "month": 8,
    "bright_sunshine_hours": 219.7,
    "bright_sunshine_percent": 53,
    "clear_days": 6,
    "cloudy_days": 12,
    "sunshine_source": "bluehill-p116",
    "cloud_class_source": "bluehill-p115",
    "printed_mean_cloud_8am_tenths": 5.8,
    "printed_mean_cloud_8pm_tenths": 5.7,
    "cloud_mean_source": "bluehill-p109"
   }
  ],
  "cloud_definition": {
   "scale": [
    0,
    10
   ],
   "observation_hours": [
    "08:00",
    "20:00"
   ],
   "source": "bluehill-p99",
   "clear_day_rule": "The published monthly clear-day class uses hourly 7 a.m.–8 p.m. cloud observations: daily mean 0–2. It is not the same statistic as our count of 8 a.m. readings ≤2.",
   "sunshine_rule": "Campbell–Stokes bright-sunshine duration; possible duration at 42° N reduced by 30 minutes per day for the low sun."
  },
  "witness": {
   "quote": "with every one of the crew only too thankful to get home alive.",
   "source": "kennebec",
   "title": "Four Provincetown Men Lost",
   "publication": "Daily Kennebec Journal (Augusta, Maine), 31 July 1911, p. 1, column 5, lower part",
   "dateline": "1911-07-30",
   "event_date": "1911-07-28",
   "event_date_basis": "The report says last Friday; 30 July 1911 was Sunday.",
   "place": "Provincetown dispatch, reporting returning fishing vessels and offshore losses. Not an eyewitness street-weather diary.",
   "scan_checked": true,
   "verbatim_context": "The schooner Leah Y, Capt. William Corea, made port today with all his boats and fishing gear gone, but with every one of the crew only too thankful to get home alive.",
   "modern_storm_classification": null
  },
  "bluehill_print_metadata": {
   "lat_dms": "42 12 44 N",
   "lon_dms": "71 6 53 W",
   "source": "bluehill-p114",
   "note": "Summit coordinates printed for 1911; distinct from base and valley station tables."
  }
 },
 "light_months": [
  {
   "month": 6,
   "bright_sunshine_hours": 222.0,
   "bright_sunshine_percent": 52,
   "clear_days": 6,
   "cloudy_days": 10,
   "sunshine_source": "bluehill-p116",
   "cloud_class_source": "bluehill-p115",
   "printed_mean_cloud_8am_tenths": 6.0,
   "printed_mean_cloud_8pm_tenths": 5.7,
   "cloud_mean_source": "bluehill-p107",
   "days": 30,
   "low_cloud_mornings": 9,
   "partly_cloudy_days": 14,
   "local_positive_rain_days": 7,
   "local_trace_days": 3,
   "local_presumed_zero_days": 20
  },
  {
   "month": 7,
   "bright_sunshine_hours": 278.0,
   "bright_sunshine_percent": 62,
   "clear_days": 9,
   "cloudy_days": 7,
   "sunshine_source": "bluehill-p116",
   "cloud_class_source": "bluehill-p115",
   "printed_mean_cloud_8am_tenths": 4.2,
   "printed_mean_cloud_8pm_tenths": 5.4,
   "cloud_mean_source": "bluehill-p108",
   "days": 31,
   "low_cloud_mornings": 16,
   "partly_cloudy_days": 15,
   "local_positive_rain_days": 4,
   "local_trace_days": 2,
   "local_presumed_zero_days": 25
  },
  {
   "month": 8,
   "bright_sunshine_hours": 219.7,
   "bright_sunshine_percent": 53,
   "clear_days": 6,
   "cloudy_days": 12,
   "sunshine_source": "bluehill-p116",
   "cloud_class_source": "bluehill-p115",
   "printed_mean_cloud_8am_tenths": 5.8,
   "printed_mean_cloud_8pm_tenths": 5.7,
   "cloud_mean_source": "bluehill-p109",
   "days": 31,
   "low_cloud_mornings": 11,
   "partly_cloudy_days": 13,
   "local_positive_rain_days": 8,
   "local_trace_days": 0,
   "local_presumed_zero_days": 23
  }
 ],
 "light_test": {
  "start": "1911-07-01",
  "end": "1911-08-31",
  "days": 62,
  "question": "How often did low-cloud mornings recur in the regional record during the two full school months?",
  "criterion": "Blue Hill summit cloud amount ≤2 tenths at 8 a.m.; a fixed-hour proxy for opportunities for direct light, not sunshine duration or a scene match.",
  "low_cloud_mornings": 27,
  "local_positive_rain_days": 12,
  "local_trace_days": 2,
  "local_presumed_zero_days": 48,
  "sensitivity": [
   {
    "threshold_tenths": 0,
    "mornings": 17
   },
   {
    "threshold_tenths": 1,
    "mornings": 22
   },
   {
    "threshold_tenths": 2,
    "mornings": 27
   },
   {
    "threshold_tenths": 3,
    "mornings": 31
   }
  ],
  "result": "27 of 62 mornings had at most two tenths cloud at Blue Hill. Bright conditions recur in both months; the painting cannot be assigned to any of them.",
  "scene_agreement": null,
  "scene_agreement_reason": "unknown_depicted_day_and_regional_cloud_observations"
 },
 "test_series": [
  {
   "date": "1911-07-01",
   "provincetown": {
    "TMAX": {
     "raw_value": 267,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 26.7,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 144,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 14.4,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 300,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 30.0,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 161,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 16.1,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "cloud_8am_tenths": 0,
   "cloud_8pm_tenths": 3,
   "cloud_source": "bluehill-p108"
  },
  {
   "date": "1911-07-02",
   "provincetown": {
    "TMAX": {
     "raw_value": 294,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 29.4,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 178,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 17.8,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 344,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 34.4,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 194,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 19.4,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "cloud_8am_tenths": 9,
   "cloud_8pm_tenths": 1,
   "cloud_source": "bluehill-p108"
  },
  {
   "date": "1911-07-03",
   "provincetown": {
    "TMAX": {
     "raw_value": 294,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 29.4,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 189,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 18.9,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 372,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 37.2,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 239,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 23.9,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "cloud_8am_tenths": 7,
   "cloud_8pm_tenths": 6,
   "cloud_source": "bluehill-p108"
  },
  {
   "date": "1911-07-04",
   "provincetown": {
    "TMAX": {
     "raw_value": 267,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 26.7,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 189,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 18.9,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 372,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 37.2,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 206,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 20.6,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "cloud_8am_tenths": 1,
   "cloud_8pm_tenths": 6,
   "cloud_source": "bluehill-p108"
  },
  {
   "date": "1911-07-05",
   "provincetown": {
    "TMAX": {
     "raw_value": 289,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 28.9,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 189,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 18.9,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 367,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 36.7,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 217,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 21.7,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "T",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "trace_not_quantified"
    }
   },
   "cloud_8am_tenths": 0,
   "cloud_8pm_tenths": 8,
   "cloud_source": "bluehill-p108"
  },
  {
   "date": "1911-07-06",
   "provincetown": {
    "TMAX": {
     "raw_value": 283,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 28.3,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 194,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 19.4,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 367,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 36.7,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 206,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 20.6,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 64,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 6.4,
     "null_reason": null
    }
   },
   "cloud_8am_tenths": 0,
   "cloud_8pm_tenths": 10,
   "cloud_source": "bluehill-p108"
  },
  {
   "date": "1911-07-07",
   "provincetown": {
    "TMAX": {
     "raw_value": 233,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 23.3,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 189,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 18.9,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 94,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 9.4,
     "null_reason": null
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 244,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 24.4,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 183,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 18.3,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 15,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 1.5,
     "null_reason": null
    }
   },
   "cloud_8am_tenths": 8,
   "cloud_8pm_tenths": 0,
   "cloud_source": "bluehill-p108"
  },
  {
   "date": "1911-07-08",
   "provincetown": {
    "TMAX": {
     "raw_value": 261,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 26.1,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 144,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 14.4,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 283,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 28.3,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 167,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 16.7,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "cloud_8am_tenths": 0,
   "cloud_8pm_tenths": 0,
   "cloud_source": "bluehill-p108"
  },
  {
   "date": "1911-07-09",
   "provincetown": {
    "TMAX": {
     "raw_value": 267,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 26.7,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 178,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 17.8,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 328,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 32.8,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 161,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 16.1,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "cloud_8am_tenths": 1,
   "cloud_8pm_tenths": 4,
   "cloud_source": "bluehill-p108"
  },
  {
   "date": "1911-07-10",
   "provincetown": {
    "TMAX": {
     "raw_value": 339,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 33.9,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 200,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 20.0,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 372,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 37.2,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 228,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 22.8,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "cloud_8am_tenths": 0,
   "cloud_8pm_tenths": 3,
   "cloud_source": "bluehill-p108"
  },
  {
   "date": "1911-07-11",
   "provincetown": {
    "TMAX": {
     "raw_value": 322,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 32.2,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 217,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 21.7,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 367,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 36.7,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 244,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 24.4,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 0,
     "measurement_flag": "P",
     "quality_flag": " ",
     "source_flag": "6",
     "value": null,
     "null_reason": "missing_presumed_zero"
    }
   },
   "cloud_8am_tenths": 0,
   "cloud_8pm_tenths": 2,
   "cloud_source": "bluehill-p108"
  },
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     "source_flag": "6",
     "value": 9.1,
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    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 217,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 21.7,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 139,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 13.9,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 15,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 1.5,
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   },
   "cloud_8am_tenths": 10,
   "cloud_8pm_tenths": 10,
   "cloud_source": "bluehill-p109"
  },
  {
   "date": "1911-08-27",
   "provincetown": {
    "TMAX": {
     "raw_value": 178,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 17.8,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 156,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 15.6,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 279,
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     "quality_flag": " ",
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     "value": 27.9,
     "null_reason": null
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 167,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 16.7,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 150,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 15.0,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 371,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 37.1,
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   },
   "cloud_8am_tenths": 10,
   "cloud_8pm_tenths": 10,
   "cloud_source": "bluehill-p109"
  },
  {
   "date": "1911-08-28",
   "provincetown": {
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     "raw_value": 261,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 26.1,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 150,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 15.0,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 13,
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     "quality_flag": " ",
     "source_flag": "6",
     "value": 1.3,
     "null_reason": null
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 256,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 25.6,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 150,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 15.0,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 15,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 1.5,
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   },
   "cloud_8am_tenths": 10,
   "cloud_8pm_tenths": 10,
   "cloud_source": "bluehill-p109"
  },
  {
   "date": "1911-08-29",
   "provincetown": {
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     "raw_value": 261,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 26.1,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 161,
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     "quality_flag": " ",
     "source_flag": "6",
     "value": 16.1,
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    },
    "PRCP": {
     "raw_value": 66,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 6.6,
     "null_reason": null
    }
   },
   "bluehill": {
    "TMAX": {
     "raw_value": 228,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 22.8,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 139,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 13.9,
     "null_reason": null
    },
    "PRCP": {
     "raw_value": 574,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 57.4,
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   },
   "cloud_8am_tenths": 10,
   "cloud_8pm_tenths": 9,
   "cloud_source": "bluehill-p109"
  },
  {
   "date": "1911-08-30",
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     "raw_value": 172,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 17.2,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 128,
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     "source_flag": "6",
     "value": 12.8,
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    },
    "PRCP": {
     "raw_value": 30,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 3.0,
     "null_reason": null
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   },
   "bluehill": {
    "TMAX": {
     "raw_value": 150,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 15.0,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 111,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 11.1,
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    },
    "PRCP": {
     "raw_value": 13,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 1.3,
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   },
   "cloud_8am_tenths": 10,
   "cloud_8pm_tenths": 10,
   "cloud_source": "bluehill-p109"
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  {
   "date": "1911-08-31",
   "provincetown": {
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     "raw_value": 156,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 15.6,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 128,
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     "quality_flag": " ",
     "source_flag": "6",
     "value": 12.8,
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    },
    "PRCP": {
     "raw_value": 310,
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     "value": 31.0,
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   },
   "bluehill": {
    "TMAX": {
     "raw_value": 139,
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     "quality_flag": " ",
     "source_flag": "6",
     "value": 13.9,
     "null_reason": null
    },
    "TMIN": {
     "raw_value": 106,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 10.6,
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    },
    "PRCP": {
     "raw_value": 427,
     "measurement_flag": " ",
     "quality_flag": " ",
     "source_flag": "6",
     "value": 42.7,
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   },
   "cloud_8am_tenths": 10,
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 ],
 "regional_station": {
  "id": "USC00190736",
  "name": "Blue Hill summit, Milton, near Boston",
  "lat": 42.21222222222222,
  "lon": -71.11472222222221,
  "distance_km": 78.5,
  "distance_to": "Provincetown Town Hall, not the unknown painting viewpoint",
  "cloud_hours": "8 a.m. and 8 p.m., as printed; the test uses 8 a.m. only",
  "note": "Separate from the local Provincetown series; no cross-station average."
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   "date": "1911-06-03",
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   "PRCP": {
    "raw_value": 0,
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    "quality_flag": " ",
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  },
  {
   "date": "1911-06-04",
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    "raw_value": 128,
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  },
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   "date": "1911-06-05",
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    "raw_value": 111,
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   "PRCP": {
    "raw_value": 0,
    "measurement_flag": "T",
    "quality_flag": " ",
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    "value": null,
    "null_reason": "trace_not_quantified"
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  },
  {
   "date": "1911-06-06",
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   "TMIN": {
    "raw_value": 106,
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    "value": 10.6,
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   "PRCP": {
    "raw_value": 122,
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    "value": 12.2,
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  },
  {
   "date": "1911-06-07",
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   "TMIN": {
    "raw_value": 111,
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   "PRCP": {
    "raw_value": 267,
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    "value": 26.7,
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  },
  {
   "date": "1911-06-08",
   "TMAX": {
    "raw_value": 200,
    "measurement_flag": " ",
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    "value": 20.0,
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   "TMIN": {
    "raw_value": 94,
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    "source_flag": "6",
    "value": 9.4,
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   "PRCP": {
    "raw_value": 0,
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    "null_reason": "missing_presumed_zero"
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  },
  {
   "date": "1911-06-09",
   "TMAX": {
    "raw_value": 267,
    "measurement_flag": " ",
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    "value": 26.7,
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   "TMIN": {
    "raw_value": 133,
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    "source_flag": "6",
    "value": 13.3,
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   "PRCP": {
    "raw_value": 0,
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    "quality_flag": " ",
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  },
  {
   "date": "1911-06-10",
   "TMAX": {
    "raw_value": 289,
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    "value": 28.9,
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   },
   "TMIN": {
    "raw_value": 161,
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    "quality_flag": " ",
    "source_flag": "6",
    "value": 16.1,
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   },
   "PRCP": {
    "raw_value": 5,
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    "value": 0.5,
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  },
  {
   "date": "1911-06-11",
   "TMAX": {
    "raw_value": 183,
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    "quality_flag": " ",
    "source_flag": "6",
    "value": 18.3,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 117,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 11.7,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 3,
    "measurement_flag": " ",
    "quality_flag": " ",
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    "value": 0.3,
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  },
  {
   "date": "1911-06-12",
   "TMAX": {
    "raw_value": 133,
    "measurement_flag": " ",
    "quality_flag": " ",
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    "value": 13.3,
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   },
   "TMIN": {
    "raw_value": 111,
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    "quality_flag": " ",
    "source_flag": "6",
    "value": 11.1,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 30,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 3.0,
    "null_reason": null
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  },
  {
   "date": "1911-06-13",
   "TMAX": {
    "raw_value": 122,
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    "quality_flag": " ",
    "source_flag": "6",
    "value": 12.2,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 89,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 8.9,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 538,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 53.8,
    "null_reason": null
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  },
  {
   "date": "1911-06-14",
   "TMAX": {
    "raw_value": 233,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 23.3,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 117,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 11.7,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 5,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 0.5,
    "null_reason": null
   }
  },
  {
   "date": "1911-06-15",
   "TMAX": {
    "raw_value": 222,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 22.2,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 128,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 12.8,
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   },
   "PRCP": {
    "raw_value": 3,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 0.3,
    "null_reason": null
   }
  },
  {
   "date": "1911-06-16",
   "TMAX": {
    "raw_value": 200,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 20.0,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 111,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "Z",
    "value": 11.1,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 51,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 5.1,
    "null_reason": null
   }
  },
  {
   "date": "1911-06-17",
   "TMAX": {
    "raw_value": 239,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 23.9,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 100,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 10.0,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 0,
    "measurement_flag": "P",
    "quality_flag": " ",
    "source_flag": "6",
    "value": null,
    "null_reason": "missing_presumed_zero"
   }
  },
  {
   "date": "1911-06-18",
   "TMAX": {
    "raw_value": 233,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 23.3,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 133,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 13.3,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 0,
    "measurement_flag": "P",
    "quality_flag": " ",
    "source_flag": "6",
    "value": null,
    "null_reason": "missing_presumed_zero"
   }
  },
  {
   "date": "1911-06-19",
   "TMAX": {
    "raw_value": 300,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 30.0,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 156,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 15.6,
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   },
   "PRCP": {
    "raw_value": 0,
    "measurement_flag": "P",
    "quality_flag": " ",
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    "value": null,
    "null_reason": "missing_presumed_zero"
   }
  },
  {
   "date": "1911-06-20",
   "TMAX": {
    "raw_value": 261,
    "measurement_flag": " ",
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    "source_flag": "6",
    "value": 26.1,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 133,
    "measurement_flag": " ",
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    "source_flag": "6",
    "value": 13.3,
    "null_reason": null
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   "PRCP": {
    "raw_value": 165,
    "measurement_flag": " ",
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    "source_flag": "6",
    "value": 16.5,
    "null_reason": null
   }
  },
  {
   "date": "1911-06-21",
   "TMAX": {
    "raw_value": 194,
    "measurement_flag": " ",
    "quality_flag": " ",
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    "value": 19.4,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 94,
    "measurement_flag": " ",
    "quality_flag": " ",
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    "value": 9.4,
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    "source_flag": "6",
    "value": 15.0,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 371,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 37.1,
    "null_reason": null
   }
  },
  {
   "date": "1911-08-28",
   "TMAX": {
    "raw_value": 256,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 25.6,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 150,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 15.0,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 15,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 1.5,
    "null_reason": null
   }
  },
  {
   "date": "1911-08-29",
   "TMAX": {
    "raw_value": 228,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 22.8,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 139,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 13.9,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 574,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 57.4,
    "null_reason": null
   }
  },
  {
   "date": "1911-08-30",
   "TMAX": {
    "raw_value": 150,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 15.0,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 111,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 11.1,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 13,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 1.3,
    "null_reason": null
   }
  },
  {
   "date": "1911-08-31",
   "TMAX": {
    "raw_value": 139,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 13.9,
    "null_reason": null
   },
   "TMIN": {
    "raw_value": 106,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 10.6,
    "null_reason": null
   },
   "PRCP": {
    "raw_value": 427,
    "measurement_flag": " ",
    "quality_flag": " ",
    "source_flag": "6",
    "value": 42.7,
    "null_reason": null
   }
  }
 ],
 "bluehill_modern_comparison": {
  "reference": "NOAA 1991–2020 monthly normals, USC00190736",
  "months": [
   {
    "month": 6,
    "historical": {
     "days": 30,
     "accepted_pairs": 30,
     "mean_max_c": 22.1,
     "mean_min_c": 12.6,
     "midpoint_mean_c": 17.4,
     "null_reason": null
    },
    "normal": {
     "mean_max_c": 24.1,
     "mean_min_c": 14.2
    },
    "departure_c": {
     "mean_max_c": -2.0,
     "mean_min_c": -1.6
    },
    "raw_normals": {
     "TMAX": {
      "raw_f": 75.4,
      "completeness": "S",
      "years": 30
     },
     "TMIN": {
      "raw_f": 57.6,
      "completeness": "S",
      "years": 30
     }
    }
   },
   {
    "month": 7,
    "historical": {
     "days": 31,
     "accepted_pairs": 31,
     "mean_max_c": 29.2,
     "mean_min_c": 17.8,
     "midpoint_mean_c": 23.5,
     "null_reason": null
    },
    "normal": {
     "mean_max_c": 27.6,
     "mean_min_c": 17.7
    },
    "departure_c": {
     "mean_max_c": 1.6,
     "mean_min_c": 0.1
    },
    "raw_normals": {
     "TMAX": {
      "raw_f": 81.7,
      "completeness": "S",
      "years": 30
     },
     "TMIN": {
      "raw_f": 63.8,
      "completeness": "S",
      "years": 30
     }
    }
   },
   {
    "month": 8,
    "historical": {
     "days": 31,
     "accepted_pairs": 31,
     "mean_max_c": 24.0,
     "mean_min_c": 14.5,
     "midpoint_mean_c": 19.3,
     "null_reason": null
    },
    "normal": {
     "mean_max_c": 26.8,
     "mean_min_c": 17.0
    },
    "departure_c": {
     "mean_max_c": -2.7,
     "mean_min_c": -2.5
    },
    "raw_normals": {
     "TMAX": {
      "raw_f": 80.2,
      "completeness": "S",
      "years": 30
     },
     "TMIN": {
      "raw_f": 62.6,
      "completeness": "S",
      "years": 30
     }
    }
   }
  ],
  "scope": "Monthly mean daily highs and lows at Blue Hill only, °C. Historical 1911 daily values versus processed modern normals; descriptive comparison, not a homogenized trend or a Provincetown normal."
 },
 "summer": {
  "days": 92,
  "accepted_pairs": 92,
  "mean_max_c": 23.9,
  "mean_min_c": 15.3,
  "midpoint_mean_c": 19.6,
  "null_reason": null,
  "peak_max_c": 33.9,
  "peak_dates": [
   "1911-07-10",
   "1911-07-13"
  ],
  "largest_quantified_precipitation": {
   "date": "1911-07-28",
   "mm": 57.4
  },
  "quantified_precipitation_days": 19,
  "trace_days": 5,
  "presumed_zero_days": 68,
  "precipitation_total_mm": null,
  "precipitation_total_reason": "presumed_zero_days_not_observed_zeroes"
 },
 "comparison_coverage": [
  {
   "year": 1893,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1894,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1895,
   "days_present": 62,
   "accepted_pairs": 62,
   "eligible": false
  },
  {
   "year": 1896,
   "days_present": 61,
   "accepted_pairs": 61,
   "eligible": false
  },
  {
   "year": 1898,
   "days_present": 92,
   "accepted_pairs": 90,
   "eligible": false
  },
  {
   "year": 1899,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1900,
   "days_present": 62,
   "accepted_pairs": 62,
   "eligible": false
  },
  {
   "year": 1901,
   "days_present": 92,
   "accepted_pairs": 89,
   "eligible": false
  },
  {
   "year": 1902,
   "days_present": 92,
   "accepted_pairs": 90,
   "eligible": false
  },
  {
   "year": 1903,
   "days_present": 92,
   "accepted_pairs": 83,
   "eligible": false
  },
  {
   "year": 1904,
   "days_present": 92,
   "accepted_pairs": 91,
   "eligible": false
  },
  {
   "year": 1905,
   "days_present": 92,
   "accepted_pairs": 87,
   "eligible": false
  },
  {
   "year": 1906,
   "days_present": 92,
   "accepted_pairs": 90,
   "eligible": false
  },
  {
   "year": 1907,
   "days_present": 92,
   "accepted_pairs": 91,
   "eligible": false
  },
  {
   "year": 1908,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1909,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1910,
   "days_present": 92,
   "accepted_pairs": 91,
   "eligible": false
  },
  {
   "year": 1911,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1912,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1913,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1914,
   "days_present": 92,
   "accepted_pairs": 91,
   "eligible": false
  },
  {
   "year": 1915,
   "days_present": 92,
   "accepted_pairs": 90,
   "eligible": false
  },
  {
   "year": 1916,
   "days_present": 92,
   "accepted_pairs": 90,
   "eligible": false
  },
  {
   "year": 1917,
   "days_present": 92,
   "accepted_pairs": 89,
   "eligible": false
  },
  {
   "year": 1918,
   "days_present": 92,
   "accepted_pairs": 91,
   "eligible": false
  },
  {
   "year": 1919,
   "days_present": 92,
   "accepted_pairs": 87,
   "eligible": false
  },
  {
   "year": 1920,
   "days_present": 92,
   "accepted_pairs": 86,
   "eligible": false
  },
  {
   "year": 1921,
   "days_present": 92,
   "accepted_pairs": 89,
   "eligible": false
  },
  {
   "year": 1922,
   "days_present": 92,
   "accepted_pairs": 86,
   "eligible": false
  },
  {
   "year": 1923,
   "days_present": 92,
   "accepted_pairs": 83,
   "eligible": false
  },
  {
   "year": 1924,
   "days_present": 92,
   "accepted_pairs": 84,
   "eligible": false
  },
  {
   "year": 1925,
   "days_present": 92,
   "accepted_pairs": 87,
   "eligible": false
  },
  {
   "year": 1926,
   "days_present": 92,
   "accepted_pairs": 89,
   "eligible": false
  },
  {
   "year": 1927,
   "days_present": 92,
   "accepted_pairs": 90,
   "eligible": false
  },
  {
   "year": 1928,
   "days_present": 92,
   "accepted_pairs": 82,
   "eligible": false
  },
  {
   "year": 1929,
   "days_present": 92,
   "accepted_pairs": 49,
   "eligible": false
  },
  {
   "year": 1930,
   "days_present": 92,
   "accepted_pairs": 83,
   "eligible": false
  },
  {
   "year": 1931,
   "days_present": 92,
   "accepted_pairs": 86,
   "eligible": false
  },
  {
   "year": 1932,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1933,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1934,
   "days_present": 92,
   "accepted_pairs": 91,
   "eligible": false
  },
  {
   "year": 1935,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1936,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1937,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1938,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1939,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1940,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1941,
   "days_present": 92,
   "accepted_pairs": 92,
   "eligible": true
  },
  {
   "year": 1942,
   "days_present": 92,
   "accepted_pairs": 88,
   "eligible": false
  },
  {
   "year": 1943,
   "days_present": 30,
   "accepted_pairs": 29,
   "eligible": false
  },
  {
   "year": 1944,
   "days_present": 92,
   "accepted_pairs": 85,
   "eligible": false
  },
  {
   "year": 1945,
   "days_present": 0,
   "accepted_pairs": 0,
   "eligible": false
  },
  {
   "year": 1946,
   "days_present": 92,
   "accepted_pairs": 82,
   "eligible": false
  },
  {
   "year": 1947,
   "days_present": 92,
   "accepted_pairs": 89,
   "eligible": false
  },
  {
   "year": 1948,
   "days_present": 92,
   "accepted_pairs": 86,
   "eligible": false
  },
  {
   "year": 1949,
   "days_present": 62,
   "accepted_pairs": 62,
   "eligible": false
  },
  {
   "year": 1950,
   "days_present": 62,
   "accepted_pairs": 60,
   "eligible": false
  },
  {
   "year": 1951,
   "days_present": 62,
   "accepted_pairs": 62,
   "eligible": false
  },
  {
   "year": 1952,
   "days_present": 92,
   "accepted_pairs": 91,
   "eligible": false
  },
  {
   "year": 1953,
   "days_present": 92,
   "accepted_pairs": 90,
   "eligible": false
  },
  {
   "year": 1954,
   "days_present": 92,
   "accepted_pairs": 86,
   "eligible": false
  },
  {
   "year": 1955,
   "days_present": 92,
   "accepted_pairs": 88,
   "eligible": false
  },
  {
   "year": 1956,
   "days_present": 92,
   "accepted_pairs": 87,
   "eligible": false
  },
  {
   "year": 1957,
   "days_present": 61,
   "accepted_pairs": 51,
   "eligible": false
  },
  {
   "year": 1958,
   "days_present": 0,
   "accepted_pairs": 0,
   "eligible": false
  }
 ],
 "rank": null,
 "rank_reason": "fragmentary_complete_windows_and_station_changes_no_homogenized_comparison",
 "modern_reference": null,
 "modern_reference_reason": "this_station_file_ends_before_1991_2020_no_successor_spliced",
 "quotes": {
  "catalogue": "Date made: 1911",
  "biography": "In 1911, Ryerson began spending summers on Cape Cod.",
  "school": "Painting from landscape, still life, and the figure—indoors and out.",
  "witness": "with every one of the crew only too thankful to get home alive."
 },
 "receipts": {
  "paam": {
   "title": "PAAM, Commercial Street, Provincetown, object 3282.058.Pa25",
   "url": "https://paam.org/collection/folder/the-napi-and-helen-van-dereck-collection/entry/commercial-street-provincetown",
   "sha256": "372792a9ac2abc885a82509314796f1d92ea7869123a3d45170fe60b90377ab7",
   "retrieved_at": "2026-10-07",
   "license": "Museum catalogue; short factual excerpts; image licence not established",
   "locator": "Cached web-tool extraction, not downloaded HTML; direct HTML request returned HTTP 403."
  },
  "checklist": {
   "title": "PAAM, Van Dereck Collection: Part II, checklist",
   "url": "https://paam.org/wp-content/uploads/2021/01/napi-II-checklist-sngl-pg.pdf",
   "sha256": "923537a796daf1a80c18b6477a4bfdbce38af85258d6685cd8134c5297c7e692",
   "retrieved_at": "2026-10-07",
   "license": "Museum publication; source verification only",
   "locator": "PDF page 6: object caption; the illustrated street scene on that page is by Pauline Palmer, not Ryerson."
  },
  "nysm": {
   "title": "Karen E. Quinn, Margery Ryerson: Art Is Contagious (NYSM, 2025)",
   "url": "https://nysm.nysed.gov/sites/default/files/2025-07/Margery_Ryerson_Art_is_Contagious_2025_a.pdf",
   "sha256": "f4a4776bd93d0c6a70e186508b08aee846465cffea9c4e179ce77848b9fad01d",
   "retrieved_at": "2026-10-07",
   "license": "Copyright NYSED; short quotation and paraphrase",
   "locator": "Printed p. 11 / PDF p. 17, visually inspected. Descriptions of other pictures are not transferred to this panel."
  },
  "nysm-text": {
   "title": "Text extraction of Quinn, Margery Ryerson: Art Is Contagious",
   "url": "https://nysm.nysed.gov/sites/default/files/2025-07/Margery_Ryerson_Art_is_Contagious_2025_a.pdf",
   "sha256": "c751c7963561a8c4b3915590432231be762c51890a941c399da6f81e0e4f2187",
   "retrieved_at": "2026-10-07",
   "license": "Same rights as source PDF",
   "locator": "Local pdftotext extraction; quote checked against rendered p. 11."
  },
  "provincetown": {
   "title": "NOAA NCEI, GHCN-Daily USC00196676, Provincetown 3 NW",
   "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/all/USC00196676.dly",
   "sha256": "edfa7779bc3a9cdaa7467b5e0d135ef3be79febe8af1b5b613fc452fbfe4496f",
   "retrieved_at": "2026-10-07",
   "license": "NOAA public data; credit NOAA/NCEI",
   "locator": "Station series, not a measurement at the painting’s viewpoint. Measurement, quality and source flags retained."
  },
  "format": {
   "title": "NOAA NCEI, GHCN-Daily format and flag definitions",
   "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/readme.txt",
   "sha256": "0e4e6f0e6947cf1add884c328a01760f31c56ef5fb86b85ed57dd5dc4c4aeaa6",
   "retrieved_at": "2026-10-07",
   "license": "NOAA public data documentation",
   "locator": "P means missing presumed zero; T means trace. Nonblank quality flags excluded."
  },
  "history": {
   "title": "NOAA NCEI, HOMR station history queried for 1 July 1911",
   "url": "https://www.ncei.noaa.gov/access/homr/services/station/search?qid=GHCND:USC00196676&date=1911-07-01&phrData=false",
   "sha256": "86eb9542631d6e89001eadd8c5199976f312a53b4449b6902ccf30f11c3734e9",
   "retrieved_at": "2026-10-07",
   "license": "NOAA public station metadata",
   "locator": "Use location.latLonPairs, not the header’s latest coordinates. Historical position recorded to whole arcminutes; observation hour not supplied."
  },
  "place": {
   "title": "OpenStreetMap, Provincetown Town Hall, 260 Commercial Street",
   "url": "https://nominatim.openstreetmap.org/search?q=Provincetown+Town+Hall&format=json&limit=1",
   "sha256": "f50a78d79dc7a0c156988a86966bcd5ca72c5c7be58307e82c4b50893b72feab",
   "retrieved_at": "2026-10-07",
   "license": "ODbL 1.0; © OpenStreetMap contributors",
   "locator": "Town-centre distance reference only; the painting’s precise viewpoint is unknown."
  },
  "advocate": {
   "title": "Provincetown Public Library digital newspaper archive",
   "url": "https://provincetown.advantage-preservation.com/",
   "sha256": "1b68020424ef1c5d613b252ebad074239511107daf744ca881907c5af699ffbd",
   "retrieved_at": "2026-10-07",
   "license": "Archive interface retained for source verification",
   "locator": "The available-year list includes 1914, 1917 and 1918 but not 1911; this does not mean that 1911 newspapers do not survive."
  },
  "press": {
   "title": "ptownie, Napi Van Dereck – The Way It Used To Was",
   "url": "https://ptownie.com/featured/napi-van-dereck-the-way-it-used-to-was/",
   "sha256": "51f25b4e212a2ae5c253a41a7f88dcb865481c75c205dda829157b0d584dd4c4",
   "retrieved_at": "2026-10-08",
   "license": "Press article; factual caption and source identification only",
   "locator": "2022 feature: caption matches artist, title, 1911, oil on panel, 12 × 15 inches; not a PAAM digital master."
  },
  "press-image": {
   "title": "Ryerson press reproduction, as captioned by ptownie",
   "url": "https://ptownie.com/wp-content/uploads/2022/05/58-Ryerson-Marjery-Austen-Commercial-St.-Provincetown-1911-2.jpg",
   "sha256": "b311f86b1603116b343f718a7cd581d44bf64006ebde334f0b0557a8f7c5f1e6",
   "retrieved_at": "2026-10-08",
   "license": "Open licence not established; expressly requested research inspection only, no public image asset",
   "locator": "1200 × 1007 pixels. Nephos visual reading tied to this capture; whole reproduction inspected."
  },
  "school": {
   "title": "U.S. Bureau of Education, Summer schools in 1911",
   "url": "https://archive.org/download/summerschooli1900unit/summerschooli1900unit.pdf",
   "sha256": "58b3179a01a18326193101bc7f2e4926caba9d47add3acf1ee3743169408858d",
   "retrieved_at": "2026-10-08",
   "license": "U.S. government report, public domain",
   "locator": "Printed p. 1141 / PDF p. 17, course; Table 2, pp. 1168–1169 / PDF pp. 44–45, column headings and row 150. Session 1911: July 1–September 1."
  },
  "bluehill": {
   "title": "NOAA NCEI, GHCN-Daily USC00190736, Blue Hill COOP",
   "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/all/USC00190736.dly",
   "sha256": "ce49b9a5d0e91d2f0193f4621f7df6438fe2089993706827d36b86df2235dd07",
   "retrieved_at": "2026-10-08",
   "license": "NOAA public data; credit NOAA/NCEI",
   "locator": "Snapshot copied byte-for-byte from the existing research cache; daily temperature and precipitation, kept separate from Provincetown."
  },
  "bluehill-history": {
   "title": "NOAA NCEI, Blue Hill history queried for 1911",
   "url": "https://www.ncei.noaa.gov/access/homr/services/station/search?qid=GHCND:USC00190736&date=1911-07-01&phrData=false",
   "sha256": "2c4665dcd00957996602b3b967a77b379a886520947ee2d553a785fd99d0547a",
   "retrieved_at": "2026-10-08",
   "license": "NOAA public station metadata",
   "locator": "Summit station, distinct from Boston City, Blue Hill LCD, and the Blue Hill base and valley records."
  },
  "bluehill-p91": {
   "title": "Blue Hill observations, Harvard Annals 73, part II (1915), p. 91",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/t2png?bg=%23FFFFFF&/seri/AnHar/0073/600/0000104.000&db_key=AST&bits=4&res=200&filetype=.png",
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   "retrieved_at": "2026-10-08",
   "license": "1915 publication, public domain; scan courtesy NASA ADS / John G. Wolbach Library",
   "locator": "Original printed page image. Title page; observations 1911–1914."
  },
  "bluehill-p93": {
   "title": "Blue Hill observations, Harvard Annals 73, part II (1915), p. 93",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/t2png?bg=%23FFFFFF&/seri/AnHar/0073/600/0000106.000&db_key=AST&bits=4&res=200&filetype=.png",
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   "retrieved_at": "2026-10-08",
   "license": "1915 publication, public domain; scan courtesy NASA ADS / John G. Wolbach Library",
   "locator": "Original printed page image. Contents."
  },
  "bluehill-p95": {
   "title": "Blue Hill observations, Harvard Annals 73, part II (1915), p. 95",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/t2png?bg=%23FFFFFF&/seri/AnHar/0073/600/0000108.000&db_key=AST&bits=4&res=200&filetype=.png",
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   "retrieved_at": "2026-10-08",
   "license": "1915 publication, public domain; scan courtesy NASA ADS / John G. Wolbach Library",
   "locator": "Original printed page image. Introduction."
  },
  "bluehill-p99": {
   "title": "Blue Hill observations, Harvard Annals 73, part II (1915), p. 99",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/t2png?bg=%23FFFFFF&/seri/AnHar/0073/600/0000112.000&db_key=AST&bits=4&res=200&filetype=.png",
   "sha256": "4d489150ba489e9b1d38d66fea7ec1673d791d208f6a21cf46214104cae17528",
   "retrieved_at": "2026-10-08",
   "license": "1915 publication, public domain; scan courtesy NASA ADS / John G. Wolbach Library",
   "locator": "Original printed page image. Cloud classes, observing hours and Campbell–Stokes sunshine definition."
  },
  "bluehill-p107": {
   "title": "Blue Hill observations, Harvard Annals 73, part II (1915), p. 107",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/t2png?bg=%23FFFFFF&/seri/AnHar/0073/600/0000120.000&db_key=AST&bits=4&res=200&filetype=.png",
   "sha256": "e446d1af1252893be2fac247da40efe0349b5c9b34c3350b8fca532380c235e1",
   "retrieved_at": "2026-10-08",
   "license": "1915 publication, public domain; scan courtesy NASA ADS / John G. Wolbach Library",
   "locator": "Original printed page image. June 1911 daily table."
  },
  "bluehill-p108": {
   "title": "Blue Hill observations, Harvard Annals 73, part II (1915), p. 108",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/t2png?bg=%23FFFFFF&/seri/AnHar/0073/600/0000121.000&db_key=AST&bits=4&res=200&filetype=.png",
   "sha256": "03460997102132cdd448ab54c650d2b03f54d3382e040638109f81530d5e0703",
   "retrieved_at": "2026-10-08",
   "license": "1915 publication, public domain; scan courtesy NASA ADS / John G. Wolbach Library",
   "locator": "Original printed page image. July 1911 daily table."
  },
  "bluehill-p109": {
   "title": "Blue Hill observations, Harvard Annals 73, part II (1915), p. 109",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/t2png?bg=%23FFFFFF&/seri/AnHar/0073/600/0000122.000&db_key=AST&bits=4&res=200&filetype=.png",
   "sha256": "466496061840c0c632a244cf3dd374927c659461014d188dfd84952569678efd",
   "retrieved_at": "2026-10-08",
   "license": "1915 publication, public domain; scan courtesy NASA ADS / John G. Wolbach Library",
   "locator": "Original printed page image. August 1911 daily table."
  },
  "bluehill-p110": {
   "title": "Blue Hill observations, Harvard Annals 73, part II (1915), p. 110",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/t2png?bg=%23FFFFFF&/seri/AnHar/0073/600/0000123.000&db_key=AST&bits=4&res=200&filetype=.png",
   "sha256": "9055062d6ad78f177ca5090700e505e9a86b9ad2427b642d59f117addd536534",
   "retrieved_at": "2026-10-08",
   "license": "1915 publication, public domain; scan courtesy NASA ADS / John G. Wolbach Library",
   "locator": "Original printed page image. September 1911 daily table; not used to assign an execution date."
  },
  "bluehill-p114": {
   "title": "Blue Hill observations, Harvard Annals 73, part II (1915), p. 114",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/t2png?bg=%23FFFFFF&/seri/AnHar/0073/600/0000127.000&db_key=AST&bits=4&res=200&filetype=.png",
   "sha256": "457ed02a27e46ed00f71d2fe5ca34b6b2a9240ac091781171e18d2f1e45849ff",
   "retrieved_at": "2026-10-08",
   "license": "1915 publication, public domain; scan courtesy NASA ADS / John G. Wolbach Library",
   "locator": "Original printed page image. 1911 summit coordinates and temperature summary."
  },
  "bluehill-p115": {
   "title": "Blue Hill observations, Harvard Annals 73, part II (1915), p. 115",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/t2png?bg=%23FFFFFF&/seri/AnHar/0073/600/0000128.000&db_key=AST&bits=4&res=200&filetype=.png",
   "sha256": "b4855414ef6ff97573a5cce2e325fd1f497591d09df45116c36a975ca1c06783",
   "retrieved_at": "2026-10-08",
   "license": "1915 publication, public domain; scan courtesy NASA ADS / John G. Wolbach Library",
   "locator": "Original printed page image. 1911 monthly cloud and precipitation summary."
  },
  "bluehill-p116": {
   "title": "Blue Hill observations, Harvard Annals 73, part II (1915), p. 116",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/t2png?bg=%23FFFFFF&/seri/AnHar/0073/600/0000129.000&db_key=AST&bits=4&res=200&filetype=.png",
   "sha256": "088ce929718e959a799433ba5c51a08850323bb6f3a996ea5154fd74703e2d73",
   "retrieved_at": "2026-10-08",
   "license": "1915 publication, public domain; scan courtesy NASA ADS / John G. Wolbach Library",
   "locator": "Original printed page image. 1911 monthly bright-sunshine hours and percent of possible."
  },
  "normals": {
   "title": "NOAA, Blue Hill COOP 1991–2020 monthly normals",
   "url": "https://www.ncei.noaa.gov/data/normals-monthly/1991-2020/access/USC00190736.csv",
   "sha256": "539bebd47a069b90ecb9084e5d7356f93dab8b09485c34389a48623565a3dd5c",
   "retrieved_at": "2026-10-08",
   "license": "NOAA public data",
   "locator": "CSV standard units, °F to 0.1; TMAX/TMIN normals converted to °C. Completeness flags and years retained. No Provincetown successor spliced."
  },
  "normals-doc": {
   "title": "NOAA, 1991–2020 monthly normals documentation",
   "url": "https://www.ncei.noaa.gov/data/normals-monthly/1991-2020/doc/Normals_MLY_Documentation_1991-2020.pdf",
   "sha256": "b12c9aee6770f84b5fa902740413bffca5cbf9a83bbebcf7e73306f46168ffc6",
   "retrieved_at": "2026-10-08",
   "license": "NOAA public documentation",
   "locator": "Section III.C, units. Historical daily data and processed modern normals are not a homogenized climate-trend estimate."
  },
  "kennebec": {
   "title": "Daily Kennebec Journal, 31 July 1911, p. 1",
   "url": "https://www.loc.gov/resource/sn82014248/1911-07-31/ed-1/?sp=1",
   "sha256": "5535a91cb304656ab76b5d075cb7ce53f2baf323ed47af63e6e5b9b35b6bd71a",
   "retrieved_at": "2026-10-08",
   "license": "1911 U.S. newspaper, public domain; LOC / Maine State Library",
   "locator": "Column 5, Four Provincetown Men Lost. Provincetown dateline July 30, referring to Friday July 28. Receipt hashes LOC IIIF 3000-pixel scan, not the holder HTML."
  },
  "kennebec-ocr": {
   "title": "LOC text-service response for Daily Kennebec Journal, 31 July 1911",
   "url": "https://tile.loc.gov/text-services/word-coordinates-service?segment=/service/ndnp/me/batch_me_debsconeag_ver01/data/sn82014248/00513682682/1911073101/0944.xml&format=alto_xml&full_text=1",
   "sha256": "4e149fa9811b087eed01650b7522313593c72458992f0eeb020f53797b97a1d1",
   "retrieved_at": "2026-10-08",
   "license": "1911 U.S. newspaper, public domain",
   "locator": "Despite filename suffix, provider returned JSON full_text. Exact short quotation checked against the page image, not accepted from OCR alone."
  },
  "transcription": {
   "title": "Nephos, scan-checked Ryerson revision transcription",
   "url": "https://adsabs.harvard.edu/abs/1915AnHar..73...91M",
   "sha256": "a01aacb32d7b7f6a3d8ccbe2f45c0980d25edbf2b002cca2a29dbc93b50e8263",
   "retrieved_at": "2026-10-08",
   "license": "Nephos transcription of public-domain sources; visual reading is our interpretation",
   "locator": "Derived file, not a download: daily cloud integers, monthly sunshine, school dates, witness and image reading. Each field cites the original scan; scan receipts are separate."
  }
 }
}