1From 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 yours, with the Proposal for a new Method of Printing, which I am much pleased with: and since you express some Confidence in my Opinion, I shall consider it very attentively and particularly, and in a Post or two send you some Observations on every Article. My long Absence from home in the Summer,...
2From Benjamin Franklin to Cadwallader Colden, 5 April 1744 (Franklin Papers)
ALS : New-York Historical Society; also transcript: Library of Congress Happening to be in this City about some particular Affairs, I have the Pleasure of receiving yours of the 28th past, here. And can now acquaint you, that the Society, as far as relates to Philadelphia, is actually formed, and has had several Meetings to mutual Satisfaction; assoon as I get home, I shall send you a short...
3From Benjamin Franklin to Cadwallader Colden, 13 September 1744 (Franklin Papers)
ALS : Yale University Library Dr. Mitchel, a Gentleman from Virginia, came to Town this Morning with Mr. Bertram, and we have been together all Day, which has hindred my Writing to you as I intended. We are to go to Mr. Logan’s tomorrow, when I shall have an Opportunity of knowing his Sentiments of your Piece on Fluxions. I am Sir Your most humble Servant Addressed: To The Honbl Cadwalr...
4From Benjamin Franklin to Cadwallader Colden, 25 October 1744 (Franklin Papers)
ALS : New-York Historical Society I communicated your Piece on Fluxions to Mr. Logan, and being at his House a few Days after, he told me, he had read it cursorily, that he thought you had not fully hit the Matter, and ( I think ) that Berkley’s Objections were well founded: but said he would read it over more attentively. Since that, he tells me there are several Mistakes in it, two of which...