The Standard Electrical Dictionary

Two streams of falling water, a pair of Leyden jars, and gravity itself: in Sloane’s pages, drops become part of a machine that steadily builds an electric charge. How can a falling drop do such work?

Published in 1892, T. O’Conor Sloane’s dictionary gathers the words and devices of a science expanding faster than any one volume could contain. Its crisp entries range from the meaning of “abscissa” to the water-dropping accumulator, while synonyms and an extensive index lead readers through the maze of electrical engineering. Sloane aims for a practical guide, not an encyclopedia: each definition opens a small door onto the ideas and inventions reshaping the age. What other unexpected workings of electricity are tucked behind its entries?

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