1Thomas Jefferson to DeWitt Clinton, 15 March 1815 (Jefferson Papers)
Jefferson, Thomas; Opinions on; science, American [index entry]
2Thomas Jefferson to Pierre Samuel Du Pont de Nemours, 6 June 1815 (Jefferson Papers)
Jefferson, Thomas; Opinions on; science, American [index entry]
3Thomas Jefferson to DeWitt Clinton, 24 November 1816 (Jefferson Papers)
Jefferson, Thomas; Opinions on; science, American [index entry]
4Thomas Jefferson to Louis H. Girardin, 17 August 1821 (Jefferson Papers)
Jefferson, Thomas; Opinions on; science, American [index entry]
5Thomas Jefferson to William H. Keating, 18 July 1822 (Jefferson Papers)
Jefferson, Thomas; Opinions on; science, American [index entry]