Experiments and Observations on Electricity Made at Philadelphia in America

EXPERIMENTS
AND
OBSERVATIONS
ELECTRICITY,
MADE AT
Philadelphia in America ,
Mr. BENJAMIN FRANKLIN,
AND
Communicated in several Letters to Mr. P. Collinson, of London , F. R. S.
LONDON :
Printed and sold by E. Cave, at St. John's Gate . 1751. ( Price 2s. 6d. )
It may be necessary to acquaint the reader, that the following observations and experiments were not drawn up with a view to their being made publick, but were communicated at different times, and most of them in letters wrote on various topicks, as matters only of private amusement.