Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 105
st few years, chiefly because of the improvement made inthe machinery used in the various manufacturing processes. For-merly hides were prepared and shoes were made completely by hand.Today, of the ninety operations on each pair of shoes, seventy areperformed by machinery. The machines used are… … Fig. 25. Fuchs and Lang Lithographers Stone Grinder Equipped with Motor Drive Courtesy of Sprague Electric Works
Electrical engineering
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