{
  "title": "Ultramarine timeline, 1824 to 1828",
  "description": "Dated records of early factory-made ultramarine, 1824 to 1828: one record per row, with the people named, whether it is a report printed in 1828 or a later retelling, the source and how much of it was read. Events are summarized in this site's words.",
  "license": "CC BY 4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/",
  "creator": "Tricks of Ear and Eye",
  "page": "https://tricksofearandeye.com/color/ultramarine/",
  "derived_from": [
    "Records transcribed row by row from the cited sources"
  ],
  "method": "Compiled by Tricks of Ear and Eye from the data listed",
  "data_credit": [
    "Hamerton, Tedaldi & Eastaugh 2013, PLoS ONE (CC BY 4.0), retelling Butler & Gash 1993; The Philosophical Magazine and Annals of Philosophy 1828 (public domain); Kraft 2008, Bulletin for the History of Chemistry (one date)"
  ]
}