Practical Electrics: A Universal Handy-book on Everyday Electrical Matters, Including Connections, Alarms, Batteries, Bells, Carbons, Induction- Intensity- and Resistance-coils, Dynamo-electric Machines, Fire Risks, Measuring, Microphones, Motors, Phonographs, Photophones, Storage, and Telephones
ene 1919 · Spon & Chamberlain