Note 52 — The Electric Telegraph.

These experiments were performed at the expense of the Royal Society, and cost 10l. 5s. 6d. In the Paper detailing the experiments, printed in the 45th volume of the Philosophical Transactions, occurs the first mention of Dr. Franklin’s name, and of his theory of positive and negative electricity.—Weld’s Hist. Royal Soc. vol. i. p. 467.