1From Thomas Jefferson to David Rittenhouse, 19 July 1778 (Jefferson Papers)
I sincerely congratulate you on the recovery of Philadelphia, and wish it may be found uninjured...
2From Thomas Jefferson to David Rittenhouse, 11 November 1784 (Jefferson Papers)
The news of war inevitable in Europe will interest your philanthropy, otherwise it would scarcely...
3From Thomas Jefferson to David Rittenhouse, 25 January 1786 (Jefferson Papers)
Your favor of Sep. 28. came to hand a few days ago. I thank you for the details on the Southern...
4From Thomas Jefferson to David Rittenhouse, 18 September 1787 (Jefferson Papers)
I am now to acknolege the receipt of your favors of April 14. and June 26. as also of the 2d....
5From Thomas Jefferson to David Rittenhouse, 12 June 1790 (Jefferson Papers)
I know not what apology to make for the trouble I am about to give you. I am sure I must call...
6From Thomas Jefferson to David Rittenhouse, 1[5] June 1790 (Jefferson Papers)
I inclosed you, the day before yesterday a rough draught of the report I had prepared on the...
7From Thomas Jefferson to David Rittenhouse, 20 June 1790 (Jefferson Papers)
I inclosed you on the 17th. the alterations I had made in my report in consequence of the Bp. of...
8From Thomas Jefferson to David Rittenhouse, 26 June 1790 (Jefferson Papers)
Your favor of the 21st. came duly to hand, and I admit all your corrections with great...
9From Thomas Jefferson to David Rittenhouse, 30 June 1790 (Jefferson Papers)
Your favor of the 25th. came to hand last night, for which I give you many thanks. The conversion...
10From Thomas Jefferson to David Rittenhouse, 1 August 1790 (Jefferson Papers)
I do myself the honour of inclosing you a printed copy of the report on measures &c. You asked in...
11From 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...
12From 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...
13From 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...
14From Thomas Jefferson to David Rittenhouse, 8 May 1791 (Jefferson Papers)
You mentioned to me once, information which you had recieved and which satisfied you that the...
15From Thomas Jefferson to David Rittenhouse, 8 June 1792 (Jefferson Papers)
Th: Jefferson incloses to Mr. Rittenhouse the first criticism which has come to his hands on the...
16George Washington to David Rittenhouse, [9 July 1792] (Jefferson Papers)
Having had under consideration the letter of the Director of the mint of this day’s date, I...
17From Thomas Jefferson to David Rittenhouse, 12 August 1792 (Jefferson Papers)
At my departure from Philadelphia, I said nothing to you about the Equatorial instrument ,...
18From Thomas Jefferson to David Rittenhouse, 7 January 1793 (Jefferson Papers)
Th: Jefferson, beginning to pack his useless furniture, finds nothing more so than the article he...
19From Thomas Jefferson to David Rittenhouse, 21 March 1793 (Jefferson Papers)
Th: Jefferson with the approbation of the President begs leave to draw the attention of Mr....
20From Thomas Jefferson to David Rittenhouse, 4 April 1793 (Jefferson Papers)
Th:J. returns to Mr. Rittenhouse the treatise of De la Sauvagere and Keith’s pamphlet which he...
21From Thomas Jefferson to David Rittenhouse, 11 April 1793 (Jefferson Papers)
I received yesterday your note on the subject of Michaud’s instructions, and think it would be...
22From Thomas Jefferson to David Rittenhouse, 6 September 1793 (Jefferson Papers)
Th: Jefferson presents his friendly respects to Mr. Rittenhouse. He has two young ladies at his...
23From Thomas Jefferson to David Rittenhouse, 6 November 1793 (Jefferson Papers)
You will recieve herein inclosed the bill of lading and invoice for between 9. and 10. tons of...
24From Thomas Jefferson to David Rittenhouse, 24 February 1795 (Jefferson Papers)
The inclosed letter to mr Madison covers two to the President & secretary of state, which were...
25From Thomas Jefferson to David Rittenhouse, 3 July 1796 (Jefferson Papers)
The inclosed letter has been misdirected to me. The services therein offered are for the...