Benjamin Franklin to Jan Ingenhousz, September 2, 1783

Dear Friend,

Inclos’d I send you a Copy of a Letter to Sir Joseph Banks, concerning the Ballons that
at present occasion much Conversation here. 8 I imagine that if you make one, and fill it with
inflammable Air, you will contrive to fire it by Electricity when it is up, and by that
means match in Report the Thunder of Nature.

To morrow is to be signed our Definitive Treaty, which establishes for the present the
Peace of Europe & America. Long, long, may it continue!— Adieu. Yours most
affectionately,

B Franklin

Dr Ingenhauss.—