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  "id": "boston-symbols-1889",
  "kind": "icons",
  "name": "Boston Symbols 1889",
  "style": "Regular",
  "version": "1.000",
  "postscript_name": "BostonSymbols1889-Regular",
  "year": 1889,
  "designer": "Individual designers and engravers unidentified",
  "foundry": "Boston Type Foundry",
  "description": "Astronomical, mathematical, medical, commercial, crochet and map symbols from the Boston specimen of 1889.",
  "license": "MIT",
  "copyright": "Copyright (c) 2026 Harold Lehmann",
  "sample_text": "",
  "observed": "Individually catalogued historical impressions from the 1889 Boston specimen; see each icon and source/inventory.json for subjects, pages, specimen numbers, crop evidence and review status.",
  "reconstructed": "No new pictorial content. Thresholding, documented crop cleanup, cubic curve fitting and font-unit rounding interpret the scanned impressions. Names, search tags, Private Use assignments, scale and bearings are new project work. Paper, catalogue numbers and prices are excluded. Multi-tone companions separate observed ink strengths into three disjoint vector regions at default opacities 1, 0.55 and 0.25; these are modern interpretations, not evidence of separately printed inks.",
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    {
      "title": "Specimen book from the Boston type foundry (1889), printed p. 255; PDF page 263, Internet Archive leaf 263",
      "url": "https://archive.org/details/specimenbookfrom00unse/page/255/mode/1up",
      "file": "reference/boston-255.jp2",
      "rights": "1889 US publication; public domain in the United States under the maximum 95-year term. Library of Congress scan hosted by Internet Archive; its recorded assessment says the Library is unaware of copyright restrictions. Metadata and page map are retained locally. No modern redraw was used.",
      "rights_url": "https://www.copyright.gov/circs/circ15a.pdf"
    },
    {
      "title": "Specimen book from the Boston type foundry (1889), printed p. 257; PDF page 265, Internet Archive leaf 265",
      "url": "https://archive.org/details/specimenbookfrom00unse/page/257/mode/1up",
      "file": "reference/boston-257.jp2",
      "rights": "1889 US publication; public domain in the United States under the maximum 95-year term. Library of Congress scan hosted by Internet Archive; its recorded assessment says the Library is unaware of copyright restrictions. Metadata and page map are retained locally. No modern redraw was used.",
      "rights_url": "https://www.copyright.gov/circs/circ15a.pdf"
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  "revival": {
    "author": "Harold Lehmann",
    "tools": [
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      "Potrace 1.16",
      "fontTools 4.64.0",
      "skia-pathops 0.9.0"
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    "notes": "Expansion of the approved pilot is in progress. See source/inventory.json for reviewed pages, pending specimens and exclusions; source/METHOD.md and tracing.json record each crop and interpretation."
  }
}