1To James Madison from David Rittenhouse, 10 July 1789 (Madison Papers)
Engaged as you are in business of the greatest importance as well as difficulty, and harrass’d by...
2To James Madison from David Rittenhouse, 19 January 1790 (Madison Papers)
I beg leave to recommend to your favorable notice Mr. Francis Bailey, printer, of this City, as a...
3To Thomas Jefferson from David Rittenhouse, 21 June 1790 (Jefferson Papers)
I received yours of the 12th. 14th. and 17th. together with the several papers mentioned, to...
4To Thomas Jefferson from David Rittenhouse, 25 June 1790 (Jefferson Papers)
Since my last letter (and not before) I have read Mr. Whitehursts Book on the Subject of...
5To Thomas Jefferson from David Rittenhouse, 2 July 1790 (Jefferson Papers)
I should not have troubled you with my Algebraical Calculations but for your present inconvenient...
6To Thomas Jefferson from David Rittenhouse, 4 January 1791 (Jefferson Papers)
Under the Building lately erected by the Philosophical Society there are very large and deep...
7To Thomas Jefferson from David Rittenhouse, 8 May 1791 (Jefferson Papers)
I thank you for a Sight of Mr. Randolph’s Letter. I must Confess I was pleased with Mr. Neville’s...
8To Thomas Jefferson from David Rittenhouse, [ca. 20 August 1791] (Jefferson Papers)
If we consider the same thing in the manner following we shall immediately perceive that the...
9To Thomas Jefferson from David Rittenhouse, 11 June 1792 (Jefferson Papers)
I have read over Mr. Keiths paper carefully, and endeavoured to make out his meaning. He has...
10To Thomas Jefferson from David Rittenhouse, 16 June 1792 (Jefferson Papers)
I have bargained with the owner for the House and Lot on Seventh Street, between Arch and Market...