1Thomas Jefferson to Charles Willson Peale, 20 August 1811 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
2Charles Willson Peale to Thomas Jefferson, 9 September 1811 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
3Charles Willson Peale to Thomas Jefferson, 3 August [October] 1811 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
4Charles Willson Peale to Thomas Jefferson, 2 March 1812 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
5Charles Willson Peale to Thomas Jefferson, 28 December 1813 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
6Caspar Wistar to Thomas Jefferson, 9 October 1815 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
7Thomas Jefferson to Joel Yancey, 20 February 1816 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
8Thomas Jefferson to Richard Peters, 6 March 1816 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
9Thomas Jefferson to Patrick Gibson, 8 March 1816 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
10Christopher Clark to Thomas Jefferson, 20 March 1816 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
11Enclosure: Thomas Main to James Henderson, [1811] (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
12John Prout to Thomas Jefferson, 17 November 1816 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
13Thomas Jefferson to George Washington Jeffreys, 3 March 1817 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
14Enclosure: Thomas Jefferson’s Catalogue of Books on Agriculture, [ca. 3 March 1817] (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
15Thomas Jefferson to Tristram Dalton, 2 May 1817 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
16Thomas Jefferson’s Notes on Lease of Tufton and Lego to Thomas Jefferson Randolph, [after 1 January 1818] (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
17Thomas Jefferson to Joel Yancey, 17 January 1819 (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]
18Enclosure: Petty Vaughan’s Notes on Rutabaga (Swedish Turnip), 29 March 1819, enclosure number 1 in Petty Vaughan to … (Jefferson Papers)
gypsum (plaster of paris); used as fertilizer [index entry]