[POWER MACHINERY
Citizens' Telephone Company, Racine, Wis.
The Dean Electric Co.]

[POWER APPARATUS FOR COMMON-BATTERY MANUAL OFFICE OF MEDIUM SIZE]

[THE POWER AND WIRE CHIEF'S ROOM OF THE EXCHANGE AT WEBB CITY, MISSOURI]

[RINGING AND CHARGING MACHINES AND POWER BOARD
Plaza Office, New York Telephone Co.]

[POWER PLANT FOR AUTOMATIC SWITCHBOARD EQUIPMENT
Bay Cities Home Telephone Company, Berkeley, Cal.]

[WESTERN ELECTRIC COMPANY BATTERY ROOM AT MONMOUTH, ILLINOIS]

[WESTERN ELECTRIC MOTOR-GENERATOR CHARGING SET]

[WESTERN ELECTRIC RINGING MACHINE]

[FRONT OF LONG-DISTANCE POWER BOARD
U.S. Telephone Company, Cleveland, Ohio.
The Dean Electric Co.]

[ToC]