1Benjamin B. Ford to Thomas Jefferson, 17 November 1809 (Jefferson Papers)
agriculture; threshing machines [index entry]
2Thomas Jefferson to Benjamin B. Ford, 28 November 1809 (Jefferson Papers)
agriculture; threshing machines [index entry]
3Thomas Jefferson to James Madison, 9 August 1810 (Jefferson Papers)
agriculture; threshing machines [index entry]
4Thomas Jefferson to James Walker, 11 January 1811 (Jefferson Papers)
agriculture; threshing machines [index entry]
5Thomas Jefferson’s Constitution for Proposed Agricultural Society of Albemarle, [ca. 1 February 1811] (Jefferson Papers)
agriculture; threshing machines [index entry]
6Thomas Jefferson to Charles A. Scott, 9 February 1811 (Jefferson Papers)
agriculture; threshing machines [index entry]
7Charles Willson Peale to Thomas Jefferson, 19 August 1812 (Jefferson Papers)
agriculture; threshing machines [index entry]
8Memorandum by Thomas Eston Randolph, 23 July [August?] 1812 (Jefferson Papers)
agriculture; threshing machines [index entry]
9Cunningham Harris to Thomas Jefferson, 30 September 1812 (Jefferson Papers)
agriculture; threshing machines [index entry]
10Thomas Jefferson to Cunningham Harris, 6 November 1812 (Jefferson Papers)
agriculture; threshing machines [index entry]