Allen, Charles Ricketson, 1862- [from old catalog] · New York, H. Holt and company · leaf 222
circuit. With one contact on the switch the in-structor can get the positive with the rheostat, and either theneutral or negative. With the other contact pupils can get thepositive through the rheostat and the neutral. At suitable inter-vals in the pupils circuit single-pole cut-outs, C, in… … connected directly with the neutral wire. On closing the switchthe current passes from positive to neutral, through the appara-tus. The plus binding-post corresponds to the positive and theneutral to the negative plates of a galvanic cell. The lamps re-tard the current so that no piece of apparatus…
Physics
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