1To Benjamin Franklin from Jan Ingenhousz, 15 November 1776 (Franklin Papers)
ALS : American Philosophical Society; duplicate: Staatsbibliothek Preussischer Kulturbesitz, West...
2To Benjamin Franklin from Jan Ingenhousz, 4 January 1777 (Franklin Papers)
ALS : American Philosophical Society A little time ago I sent you a lettre by the way of London...
3To Benjamin Franklin from Jan Ingenhousz, 29 January 1777 (Franklin Papers)
ALS : American Philosophical Society As I recieved my lettre Directed to you at Philadelphia back...
4To Benjamin Franklin from Jan Ingenhousz, 2 April 1777 (Franklin Papers)
ALS : American Philosophical Society I recieved a note from the post office of Paris, that a...
5To Benjamin Franklin from Jan Ingenhousz, 28 June 1777 (Franklin Papers)
ALS : American Philosophical Society It seems all your lettres miscarry in a certain way. Your...
6To Benjamin Franklin from Jan Ingenhousz, 26 August 1777 (Franklin Papers)
ALS : American Philosophical Society I Stay’d a day longer in the Country as I had proposed. I...
7To Benjamin Franklin from Jan Ingenhousz, 30 August 1777 (Franklin Papers)
ALS : American Philosophical Society I found a coach, very easy and very strong, which can keep 4...
8To Benjamin Franklin from Ingenhousz, 18 October 1777 (Franklin Papers)
ALS : Historical Society of Pennsylvania I rcived yesterday from Madame chaumont the lettre of...
9To Benjamin Franklin from Ingenhousz, 14 December 1777 (Franklin Papers)
ALS : University of Pennsylvania Library; AL (draft): Yale University Library You will be...
10To Benjamin Franklin from [Jan Ingenhousz], 6 March 1778 (Franklin Papers)
AL : Historical Society of Pennsylvania I recieved your kind lettre at Brussels with several...
11To Benjamin Franklin from Ingenhousz, 12 [May] 1778 (Franklin Papers)
Letterbook abstract: Gemeente-Archief, Statserf, Breda To Dr. Franklin in passy that sir john...
12To Benjamin Franklin from Ingenhousz, 14 May 1778 (Franklin Papers)
ALS : Historical Society of Pennsylvania You will have recieved my lettre of May 12th. which I...
13To Benjamin Franklin from Ingenhousz, 15 June 1778 (Franklin Papers)
ALS : Historical Society of Pennsylvania I recieved your kind lettre dated juin 8 and thank you...
14To Benjamin Franklin from Jan Ingenhousz, 5 October 1778 (Franklin Papers)
ALS : American Philosophical Society You will be surprised, that I did not keep my word or...
15To Benjamin Franklin from Jan Ingenhousz, 14 November 1778 (Franklin Papers)
ALS : American Philosophical Society As I was not able to finish as soon as I expected the book I...
16To Benjamin Franklin from Jan Ingenhousz, 1 April 1779 (Franklin Papers)
Letterbook abstract: Gemeente-Archief, Statserf, Breda a Franklin , que le volume des Trans....
17To Benjamin Franklin from Ingenhousz, 9 April 1779 (Franklin Papers)
ALS : American Philosophical Society Since my last of last weak I saw your old femal friend in...
18To Benjamin Franklin from Ingenhousz, 25 May 1779 (Franklin Papers)
ALS : American Philosophical Society I reciev’d your lettre of the 4 of May and thank you for the...
19To Benjamin Franklin from Jan Ingenhousz, 18 November 1779 (Franklin Papers)
ALS : American Philosophical Society I find myself very happy to be in a country, from which I...
20To Benjamin Franklin from Jan Ingenhousz, 3 May 1780 (Franklin Papers)
ALS : Library of Congress I hope you are not so entirely involved in the troublesome business of...
21To Benjamin Franklin from Jan Ingenhousz, 5 December 1780 (Franklin Papers)
ALS : American Philosophical Society I had the satisfaction of being informed by a lettre of...
22To Benjamin Franklin from Jan Ingenhousz, 7 February 1781 (Franklin Papers)
ALS : American Philosophical Society I wrote you a lettre some weaks ago containing an account of...
23To Benjamin Franklin from Ingenhousz, 7 April 1781 (Franklin Papers)
ALS : American Philosophical Society I did send you in Decembre last the issue of the experiment...
24To Benjamin Franklin from Jan Ingenhousz, 23 May 1781 (Franklin Papers)
ALS : American Philosophical Society After having longed such a long while for an answer upon my...
25To Benjamin Franklin from Ingenhousz, 29 August 1781 (Franklin Papers)
ALS : American Philosophical Society Give me leave to acquaint you, that I wrote an other letter...
26To Benjamin Franklin from Jan Ingenhousz, 8 December 1781 (Franklin Papers)
ALS : American Philosophical Society I Can make no doubt but my lettres came all to hand dated...
27To Benjamin Franklin from Jan Ingenhousz, 24 April 1782 (Franklin Papers)
ALS : American Philosophical Society When you consider, how long time I had the honour of...
28To Benjamin Franklin from Ingenhousz, 12 June 1782 (Franklin Papers)
ALS : American Philosophical Society I hope you have recieved in du time my last dated april 24...
29To Benjamin Franklin from Jan Ingenhousz, 20 August 1782 (Franklin Papers)
ALS : American Philosophical Society I Was very happy in recieving your lettre containing the...
30To Benjamin Franklin from Ingenhousz, 2 October 1782 (Franklin Papers)
ALS : American Philosophical Society I got at last an account of Pere Barletti’s pamphlet in an...