{
  "name": "Known then: Whitney's musket contract, 1798",
  "desc": "Known then: card for the Treasury's 1798 musket contract with Eli Whitney; each item carries its source number from the article.",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "Treaties & Tradeoffs",
  "url": "https://treatiesandtradeoffs.com/ideas/interchangeable-parts/",
  "from": [],
  "how": "",
  "data_by": [
    "Thomas Jefferson, letters of 30 August 1785 and 24 January 1786, The Writings of Thomas Jefferson, ed. H. A. Washington, vol. 1 (1853; 1861 printing), Project Gutenberg eBook #45847, accessed 2026-11-02, public domain",
    "Thomas Jefferson, letter of 19 September 1789, The Writings of Thomas Jefferson, ed. H. A. Washington, vol. 3 (1853; 1861 printing), Project Gutenberg eBook #52878, accessed 2026-11-02, public domain",
    "Denison Olmsted, Memoir of Eli Whitney, Esq. (New Haven: Durrie & Peck, 1846), accessed 2026-11-02, public domain"
  ]
}