11Charles Willson Peale to Thomas Jefferson, 19 August 1812 (Jefferson Papers)
agriculture; threshing machines [index entry]
12Joel Yancey to Thomas Jefferson, 26 September 1819 (Jefferson Papers)
agriculture; threshing machines [index entry]
13Charles Willson Peale to Thomas Jefferson, 2 May 1815 (Jefferson Papers)
agriculture; threshing machines [index entry]
14Thomas Jefferson to James Madison, 9 August 1810 (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 to Charles Willson Peale, 8 May 1816 (Jefferson Papers)
agriculture; threshing machines [index entry]
17Thomas Jefferson to Charles Willson Peale, 13 June 1815 (Jefferson Papers)
agriculture; threshing machines [index entry]
18Thomas Jefferson to John H. Peyton, 17 December 1819 (Jefferson Papers)
agriculture; threshing machines [index entry]
19Thomas Jefferson to Charles A. Scott, 9 February 1811 (Jefferson Papers)
agriculture; threshing machines [index entry]
20Thomas Jefferson to Archibald Thweatt, 16 March 1817 (Jefferson Papers)
agriculture; threshing machines [index entry]
21Thomas Jefferson to James Walker, 11 January 1811 (Jefferson Papers)
agriculture; threshing machines [index entry]
22Thomas Jefferson to Joel Yancey, 7 June 1815 (Jefferson Papers)
agriculture; threshing machines [index entry]
23Thomas Jefferson to Joel Yancey, 12 May 1820 (Jefferson Papers)
agriculture; threshing machines [index entry]
24Thomas Jefferson’s Notes on Alexander Hepburn’s Poplar Forest Materials List, [ca. 8 October 1819] (Jefferson Papers)
agriculture; threshing machines [index entry]
25Memorandum by Thomas Eston Randolph, 23 July [August?] 1812 (Jefferson Papers)
agriculture; threshing machines [index entry]
26Alexander Hepburn’s List of Materials for Work at Poplar Forest [ca. 8 October 1819] (Jefferson Papers)
agriculture; threshing machines [index entry]
27Thomas Jefferson’s Calculation of Timber Needed by Alexander Hepburn at Poplar Forest, [ca. 8 October 1819] (Jefferson Papers)
agriculture; threshing machines [index entry]
28Thomas Jefferson’s Constitution for Proposed Agricultural Society of Albemarle, [ca. 1 February 1811] (Jefferson Papers)
agriculture; threshing machines [index entry]