1From Thomas Jefferson to David Rittenhouse, 22 February 1791 (Jefferson Papers)
Th: Jefferson will be obliged to Mr. Rittenhouse to inform him who has the best assorted shop of...
2From Thomas Jefferson to David Rittenhouse, 19 March 1791 (Jefferson Papers)
I have to regret that having rode into the country yesterday afternoon, I did not return till it...
3From Thomas Jefferson to David Rittenhouse, [21 March 1791] (Jefferson Papers)
Th: Jefferson sends to Mr. Rittenhouse Bp. Watson’s essay on the subjects of chemistry, which is...