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Mr. Franklin's treatise, lately presented to the Royal Society, consists of four letters to his correspondent in England, and of another part intituled "Opinions and conjectures concerning the properties and effects of the electrical "matter arising from experiments and observations.”

philosophical transactions of the royal society of london

XXXI. An account of Mr. Benjamin Franklin’s treatise, lately published, intituled, Experiments and observations on electricity, made at Philadelphia in America