Modern electricity and magnetism, theoretically and practically considered
Elroy M. Avery's 1885 physics textbook on electricity and magnetism, issued by Sheldon and Company of New York and Chicago for American school and college students. Wood engravings show benchtop apparatus — electroscopes under bell jars, coils, binding posts, insulating stands — with hands entering the frame; useful for cutaway diagrams, labelled terminals, and hatched wood-grain textures.
