{
  "name": "Calibration card: the U.S. yard",
  "desc": "The values in the Calibration card at the top of the page, one field per row, with the source of each value.",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "The Yardstick Almanac",
  "url": "https://theyardstickalmanac.com/units/metric-system-united-states/",
  "from": [
    "Yard and pound: National Bureau of Standards and U.S. Coast and Geodetic Survey notice, Federal Register 24 FR 5348 (July 1, 1959)",
    "Mendenhall Order of April 5, 1893, and the 1960 wavelength announcement, as reprinted in NBS Special Publication 447",
    "Customary relations and printed decimal values: NIST Handbook 44 (2026 edition), Appendix C",
    "United States Code, 2024 edition, 15 U.S.C. §§204–205b (acts of 1866, 1975, 1988 and 2007)"
  ],
  "how": "Compiled by The Yardstick Almanac from the data listed",
  "data_by": [
    "24 FR 5348 (1959), the Mendenhall Order (1893), NIST Handbook 44 (2026) and 15 U.S.C. §§205–205b; values computed 2026-11-01, CC BY 4.0"
  ]
}