Experiments and Observations on Electricity, Made at Philadelphia in America, by Benjamin Franklin, L.L.D. and F.R.S. To Which Are Added, Letters and Papers on Philosophical Subjects. The Whole Corrected, Methodized, Improved, and Now First Collected into One Volume, and Illustrated with Copper Plates. (London, 1769.) Experiments and Observations on Electricity, Made at Philadelphia in America, by Benjamin Franklin, L.L.D and F.R.S. Member of the Royal Academy of Sciences at Paris, of the Royal Society at Göttingen, and of the Batavian Society in Holland, and President of the Philosophical Society at Philadelphia. To Which Are Added, Letters and Papers on Philosophical Subjects. The Whole Corrected, Methodized, Improved, and Now Collected into One Volume, and Illustrated with Copper Plates. The Fifth Edition. (London, 1774.)