Cyclopedia of Applied Electricity: A General Reference Work on Direct-current Generators and Motors, Storage Batteries, Electric Wiring, Electrical Measurements, Electric Lighting, Electric Railways, Power Stations, Power Transmission, Alternating-current Machinery, Telephony, Telegraphy, Etc., Prepared by a Corps of Electrical Experts, Engineers, and Designers of the Highest Professional Standing. Illustrated with Over Two Thousand Engravings, Volume 3
1914년 1월 · American school of correspondence