A volume of the Every Boy’s Mechanical Library that explains, with original diagrams, how electric motors work and how to build and test them. Zerbe covers cells and batteries, voltage and amperage, circuit testing with an ammeter, magnets and windings, and the principles that let current turn into motion, written for a curious boy with a workbench.
An early twentieth-century hands-on primer for anyone who likes to see how the electric age was explained to its young tinkerers. Download the free EPUB.