(1773). [BECKET (J.B.). AN ESSAY ON ELECTRICITY, containing a series of experiments. Bristol, Printed for J.B. Becket, 1773. In-8 of 15-[1]151 pages, half brown calf with corners (later English binding). ORIGINAL EDITION which also includes descriptions of experiments and observations made by Benjamin Franklin. Hardback: - CARPUE. An introduction to Electricity and Galvanism. London, 1803. 8-112 pages and 3 folding plates. Minor foxing. Ex libris Conrad W. Cooke.