11To 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...
12To Benjamin Franklin from Jan Ingenhousz, 28 January 1783 (Franklin Papers)
ALS : American Philosophical Society As I expected every day to hear that peace was actualy made,...
13To 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...
14To Benjamin Franklin from Jan Ingenhousz, 20 August 1782 (Franklin Papers)
ALS : American Philosophical Society I Was very happy in recieving your lettre containing the...
15To Benjamin Franklin from Ingenhousz, 27 November 1782 (Franklin Papers)
ALS : American Philosophical Society I have at last recieved the German American newspapers as...
16To 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...
17To 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...
18To 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...
19To Benjamin Franklin from [Jan Ingenhousz], 6 March 1778 (Franklin Papers)
AL : Historical Society of Pennsylvania I recieved your kind lettre at Brussels with several...
20To 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...