1Thomas Jefferson to Wilson Cary Nicholas, 19 April 1816 (Jefferson Papers)
scientific instruments; sextants [index entry]
2Thomas Jefferson to Bishop James Madison, 29 December 1811 (Jefferson Papers)
scientific instruments; sextants [index entry]
3Thomas Jefferson to Robert Patterson, 13 October 1815 (Jefferson Papers)
scientific instruments; sextants [index entry]
4Thomas Jefferson to George Wyche, 10 November 1818 (Jefferson Papers)
scientific instruments; sextants [index entry]
5Thomas Jefferson to John Wood, 1 April 1816 (Jefferson Papers)
scientific instruments; sextants [index entry]
6Thomas Jefferson to John Payne Todd, 12 March 1820 (Jefferson Papers)
scientific instruments; sextants [index entry]
7Thomas Jefferson’s Calculations of Latitudes of the Sharp Peak of Otter and Natural Bridge, 18 September–10 November … (Jefferson Papers)
scientific instruments; sextants [index entry]
8Thomas Jefferson to John Wood, 7 August 1819 (Jefferson Papers)
scientific instruments; sextants [index entry]
9Thomas Jefferson to John Wood, 9 February 1817 (Jefferson Papers)
scientific instruments; sextants [index entry]
10Thomas Jefferson’s Observations for Calculating the Latitude of Monticello, 30 January–4 February 1816 (Jefferson Papers)
scientific instruments; sextants [index entry]