11Thomas Jefferson to James Walker, 11 January 1811 (Jefferson Papers)
agriculture; threshing machines [index entry]
12Thomas Jefferson to Joel Yancey, 7 June 1815 (Jefferson Papers)
agriculture; threshing machines [index entry]
13Thomas Jefferson to Joel Yancey, 12 May 1820 (Jefferson Papers)
agriculture; threshing machines [index entry]
14Thomas Jefferson to Alexander Hepburn, 20 May 1820 (Jefferson Papers)
agriculture; threshing machines [index entry]
15Thomas Jefferson to Charles Willson Peale, 21 March 1815 (Jefferson Papers)
agriculture; threshing machines [index entry]
16Thomas Jefferson’s Calculation of Timber Needed by Alexander Hepburn at Poplar Forest, [ca. 8 October 1819] (Jefferson Papers)
agriculture; threshing machines [index entry]
17Thomas Jefferson to Charles A. Scott, 9 February 1811 (Jefferson Papers)
agriculture; threshing machines [index entry]
18Thomas Jefferson to Benjamin B. Ford, 28 November 1809 (Jefferson Papers)
agriculture; threshing machines [index entry]
19Thomas Jefferson to Charles Willson Peale, 8 May 1816 (Jefferson Papers)
agriculture; threshing machines [index entry]
20Thomas Jefferson to Charles Willson Peale, 13 June 1815 (Jefferson Papers)
agriculture; threshing machines [index entry]
21Thomas Jefferson to Jeremiah A. Goodman, 6 January 1815 (Jefferson Papers)
agriculture; threshing machines [index entry]
22Charles Willson Peale to Thomas Jefferson, 28 December 1813 (Jefferson Papers)
agriculture; threshing machines [index entry]
23Charles Willson Peale to Thomas Jefferson, 19 August 1812 (Jefferson Papers)
agriculture; threshing machines [index entry]
24Charles Willson Peale to Thomas Jefferson, 2 May 1815 (Jefferson Papers)
agriculture; threshing machines [index entry]
25Memorandum by Thomas Eston Randolph, 23 July [August?] 1812 (Jefferson Papers)
agriculture; threshing machines [index entry]
26Joel Yancey to Thomas Jefferson, 8 October 1819 (Jefferson Papers)
agriculture; threshing machines [index entry]
27Joel Yancey to Thomas Jefferson, 14 October 1819 (Jefferson Papers)
agriculture; threshing machines [index entry]
28Joel Yancey to Thomas Jefferson, 26 September 1819 (Jefferson Papers)
agriculture; threshing machines [index entry]