1Thomas Jefferson’s Calculations of Latitudes of the Sharp Peak of Otter and Natural Bridge, 18 September–10 November … (Jefferson Papers)
astronomy; and solar observations [index entry]
2William Lambert to Thomas Jefferson, 28 June 1822 (Jefferson Papers)
astronomy; and solar observations [index entry]
3Thomas Jefferson to Henry A. S. Dearborn, 15 November 1811 (Jefferson Papers)
astronomy; and solar observations [index entry]
4Thomas Jefferson to William Lambert, 29 December 1811 (Jefferson Papers)
astronomy; and solar observations [index entry]
5Thomas Jefferson to John Payne Todd, 10 October 1811 (Jefferson Papers)
astronomy; and solar observations [index entry]
6William Lambert to Thomas Jefferson, 9 January 1812 (Jefferson Papers)
astronomy; and solar observations [index entry]
7William Lambert to Thomas Jefferson, 14 November 1811 (Jefferson Papers)
astronomy; and solar observations [index entry]
8William Lambert to Thomas Jefferson, 6 July 1822 (Jefferson Papers)
astronomy; and solar observations [index entry]
9William Lambert to Thomas Jefferson, 11 July 1822 (Jefferson Papers)
astronomy; and solar observations [index entry]
10Bishop James Madison to Thomas Jefferson, 19 November 1811 (Jefferson Papers)
astronomy; and solar observations [index entry]