TO PETER COLLINSON, ESQ. F. R. S. LONDON.
_Accumulation of the electrical Fire proved to be in the
electrified Glass.--Effect of Lightning on the Needle of Compasses,
explained.--Gunpowder fired by the electric Flame._
_Philadelphia, July 27, 1750._
The Complete Works in Philosophy, Politics and Morals of the late Dr. Benjamin Franklin, Vol. 1 [of 3] · 第 106 / 291 题