Watchmen's Time Detectors Operated by Batteries or Magneto Generators (1900)
Holtzer-Cabot Electric Company · Holtzer-Cabot Electric Company · leaf 147
I1 tlllltllllll H Hilt UNI IIIMIIIII HUM liiinriMMM H, . . . .THE HOLTZER-CABOT ELECTRIC COMPANY Boston, Mass. Diagrams of Dynamo and Motor Connections. ARMATURE 8- FIELD