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Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914) Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 99
-> bo- cu a _ to C< 2 w 68. ^t (SO iV-i CU CU £.2? o£ O obfl a* cu cu dv. S^ © O g +J CO 4J 8§gg fl-SC « o • rt CO £o 5 Sb 8S&38&8 i^os^S 1? g o g c g 8,Vo~ « o S^r^ p bfi co 8.al8§^&0rl^; ^f^^S o fa£S § ° o^^ w ^c ^? •-2 ■ .SO cu •-• ^ hn+? ^ fe 55 ^^ >4J-r . ,o27 2^^« ♦J P Vi… … Figs. 3,036 to 3,039.—Views showing various parts of a magneto switchboard. 1,2 and 3,lamps, used in connection with the transfer circuit; 4, jacks, or sockets into which theoperators plugs are inserted; 5, drops, used as a clearing out signal on the cord circuits,that is, to provide a means for… Electrical engineering
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