{
  "title": "Nightingale rates: area and radius ratios",
  "description": "Three disease rates from Nightingale's 1858 Table No. 2 (January 1855, June 1855, January 1856) compared in pairs: the rate ratio, which is the area ratio when wedge area is set to the rate, the radius ratio under that area coding (its square root), and the area ratio that would result if the radius were set to the rate instead (its square). Our arithmetic; retrieved 2026-10-31. License CC BY 4.0.",
  "license": "CC BY 4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/",
  "creator": "Puzzles, Charts & Dilemmas",
  "page": "https://puzzleschartsanddilemmas.com/charts/nightingale-rose-diagram/",
  "derived_from": [
    "Florence Nightingale, Notes on Matters Affecting the Health, Efficiency, and Hospital Administration of the British Army (London: Harrison, 1858), Table No. 2, p. 315, transcribed from the page image of the Wellcome Library copy, https://archive.org/details/b20387118 (Public Domain Mark)"
  ],
  "method": "Compiled by Puzzles, Charts & Dilemmas from the data listed",
  "data_credit": [
    "Florence Nightingale, Notes on Matters Affecting the Health, Efficiency, and Hospital Administration of the British Army (1858), Table No. 2, p. 315; Wellcome Library copy, public domain"
  ]
}