1Thomas Jefferson to Alexander Hepburn, 7 August 1819 (Jefferson Papers)
agriculture; threshing machines [index entry]
2Thomas Jefferson to Cunningham Harris, 6 November 1812 (Jefferson Papers)
agriculture; threshing machines [index entry]
3Thomas Jefferson to James Madison, 9 August 1810 (Jefferson Papers)
agriculture; threshing machines [index entry]
4Thomas Jefferson’s Notes on Alexander Hepburn’s Poplar Forest Materials List, [ca. 8 October 1819] (Jefferson Papers)
agriculture; threshing machines [index entry]
5Thomas Jefferson to John H. Peyton, 17 December 1819 (Jefferson Papers)
agriculture; threshing machines [index entry]
6Thomas Jefferson to Archibald Thweatt, 16 March 1817 (Jefferson Papers)
agriculture; threshing machines [index entry]
7Thomas Jefferson to James Walker, 11 January 1811 (Jefferson Papers)
agriculture; threshing machines [index entry]
8Memorandum by Thomas Eston Randolph, 23 July [August?] 1812 (Jefferson Papers)
agriculture; threshing machines [index entry]
9Thomas Jefferson to Joel Yancey, 7 June 1815 (Jefferson Papers)
agriculture; threshing machines [index entry]
10Thomas Jefferson to Joel Yancey, 12 May 1820 (Jefferson Papers)
agriculture; threshing machines [index entry]