细节
A two-plate Wimshurst electrostatic induction machine,
by Philip Harris LTD., on mahogany base 13in. (33cm.) wide, four galvanometers, two amperemeters and other items (A Lot)
by Philip Harris LTD., on mahogany base 13in. (33cm.) wide, four galvanometers, two amperemeters and other items (A Lot)