1William Lambert to Thomas Jefferson, 13 June 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
2William Lambert to Thomas Jefferson, 23 July 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
3William Lambert to Thomas Jefferson, 4 September 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
4William Lambert to Thomas Jefferson, 17 September 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
5Enclosure: William Lambert’s Table for Computing the Moon’s Motion, with Examples [ca. 19 September 1809] (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
6William Lambert to Thomas Jefferson, 5 December 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
7William Lambert to Thomas Jefferson, 8 December 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
8William Lambert to Thomas Jefferson, 19 April 1810 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
9William Lambert to Thomas Jefferson, 24 July 1810 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
10Thomas Jefferson’s Astronomical Calculations, 5-11 February 1811 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
11Thomas Jefferson’s Calculations of Latitude of Poplar Forest, 8 November–3 December 1816 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
12Thomas Jefferson to Isaac Briggs, 17 April 1816 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
13Thomas Jefferson to Wilson Cary Nicholas, 19 April 1816 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
14Thomas Jefferson’s Calculations of Latitude of Willis’s Mountain, 8-9 December 1816 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
15Thomas Jefferson to Bartholomew Fuller, 17 December 1819 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
16Enclosure: Josiah Meigs and Robert King, Geometric Meteorological Chart for Washington, D.C., 1820, [by 3 May 1821] (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
17William Lambert to Thomas Jefferson, 18 March 1822 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
18Enclosure: William Lambert’s Methods of Calculating the Moon’s Parallaxes, 27–28 June 1822 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
19Enclosure: William Lambert’s Calculation of the United States Capitol’s Longitude from Greenwich, 11 July 1822 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]