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 48
the principle of electro-static induction. If theeffect were magnetic, oneend should be repelled andthe other attracted. Again,if a sheet of zinc, aluminum,or copper is inserted betweenthe deflected needle and thecharge, all effect which wasproduced upon the needleby the charge will be cut off,for… … Fig. 35. Demonstrating Magnetic Effect ofElectric Current. 38 ELECTRICITY AND MAGNETISM 29
Electrical engineering
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