1From Benjamin Franklin to Cadwallader Colden, 11 October 1750 (Franklin Papers)
ALS : New-York Historical Society I have learnt by different hands, that Dr. Mitchel continues in...
2From Benjamin Franklin to Cadwallader Colden, 26 February 1763 (Franklin Papers)
ALS : New-York Historical Society; draft (incomplete): American Philosophical Society Your Favour...
3From Benjamin Franklin to Cadwallader Colden, 6 December 1753 (Franklin Papers)
Letter: ALS : New-York Historical Socity; enclosure: draft: American Philosophical Society I...
4From Benjamin Franklin to Cadwallader Colden, 10 July 1746 (Franklin Papers)
ALS : New-York Historical Society I have your Favours of June 2d. and the 7th Instant. I thank...
5From Benjamin Franklin to Cadwallader Colden, 13 August 1747 (Franklin Papers)
ALS : New-York Historical Society I am glad the electrical Observations please you. I leave them...
6From Benjamin Franklin to Cadwallader Colden, 4 November 1743 (Franklin Papers)
ALS : New-York Historical Society; also transcript: Library of Congress I received the Favour of...
7From Benjamin Franklin to Cadwallader Colden, 12 April 1753 (Franklin Papers)
ALS : New-York Historical Society I received your Favour of March 20. and a subsequent one...
8From Benjamin Franklin to Cadwallader Colden, 6 August 1747 (Franklin Papers)
ALS : New-York Historical Society; draft: American Philosophical Society The Observations I sent...
9From Benjamin Franklin to Cadwallader Colden, 27 August 1747 (Franklin Papers)
ALS : Yale University Library This just serves to enclose you a Letter from our Friend Bertram;...
10From Benjamin Franklin to Cadwallader Colden, 28 June 1750 (Franklin Papers)
ALS : New-York Historical Society I wrote a Line to you last Post, and sent you some Electrical...