Multiple series and constant current arc lamps for direct current circuits.
A 1907 trade catalogue issued by the Western Electric Company in Chicago, listing direct-current arc lamps and wiring devices for electrical contractors and lighting engineers. Halftone photographs and cutaway views show cylindrical lamp housings, cast hanger brackets, enameled shades, and pear-shaped glass globes, usable as isolated industrial-fixture silhouettes or mechanical section diagrams.
