1From Benjamin Franklin to Peter Collinson, 28 March 1747 (Franklin Papers)
MS not found; reprinted from extract in Benjamin Franklin, Experiments and Observations on...
2From Benjamin Franklin to Peter Collinson, 25 May 1747 (Franklin Papers)
Copy: American Academy of Arts and Sciences In my last I informed you that In pursuing our...
3To Benjamin Franklin from Peter Collinson, 1 June 1747 (Franklin Papers)
ALS : American Philosophical Society I shall be pleased to Hear that Mine per Mesnard and Dowers...
4From Benjamin Franklin to Peter Collinson, 28 July 1747 (Franklin Papers)
Copy: American Academy of Arts and Sciences The inclosed is a Copy of my last, which went by the...
5From Benjamin Franklin to Peter Collinson, 14 August 1747 (Franklin Papers)
ALS : Pierpont Morgan Library I have lately written two long Letters to you on the Subject of...
6To Benjamin Franklin from Peter Collinson, 12 April 1748 (Franklin Papers)
ALS : Library Company of Philadelphia I was very fortunate to receive both thy Curious...
7To Benjamin Franklin from Peter Collinson, 14 June 1748 (Franklin Papers)
ALS : University of Pennsylvania Library The Bearer Mr. Kalm Is an Ingenious Man and comes over...
8From Benjamin Franklin to Peter Collinson, 18 October 1748 (Franklin Papers)
ALS : Pierpont Morgan Library I have receiv’d your several Favours of April 1. June 2. June 14...
9From Benjamin Franklin to Peter Collinson, 29 April 1749 (Franklin Papers)
Copy: American Academy of Arts and Sciences I now send you some Further Experiments and...
10To Benjamin Franklin from Peter Collinson, 14 September 1749 (Franklin Papers)
ALS : Historical Society of Pennsylvania I was unwilling to loose the Opertunity per Cap. Rice—So...