1Christopher Clark to Thomas Jefferson, 20 March 1816 (Jefferson Papers)
agriculture; use of gypsum in [index entry]
2Thomas Jefferson to Patrick Gibson, 8 March 1816 (Jefferson Papers)
agriculture; use of gypsum in [index entry]
3Thomas Jefferson to Richard Peters, 6 March 1816 (Jefferson Papers)
agriculture; use of gypsum in [index entry]
4Thomas Jefferson to Joel Yancey, 20 February 1816 (Jefferson Papers)
agriculture; use of gypsum in [index entry]
5Caspar Wistar to Thomas Jefferson, 9 October 1815 (Jefferson Papers)
agriculture; use of gypsum in [index entry]
6Thomas Jefferson to Charles Willson Peale, 13 June 1815 (Jefferson Papers)
agriculture; use of gypsum in [index entry]
7Thomas Jefferson to Joel Yancey, 7 June 1815 (Jefferson Papers)
agriculture; use of gypsum in [index entry]
8Thomas Jefferson’s Constitution for Proposed Agricultural Society of Albemarle, [ca. 1 February 1811] (Jefferson Papers)
agriculture; use of gypsum in [index entry]
9John Hollins to Thomas Jefferson, 27 January 1811 (Jefferson Papers)
agriculture; use of gypsum in [index entry]
10Thomas Jefferson to John Hollins, 20 January 1811 (Jefferson Papers)
agriculture; use of gypsum in [index entry]