The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 173
56 DYNAMIC ELECTRICITY AND MAGNETISM. Y and Z must pass through the coil d\ which, beingtwice the length of c^ would have twice the resistance ifmade of wire of the same gauge, or four times the re-sistance if also the cross-section of the wire were onehalf that of c. In this way resistance can be… … Fig. 63. case has a hard-rubber cover by which the brass blocksare insulated above, each pair being connected througha coil below, as shown in Fig. 62. A hole in the centreof each block receives each plug when removed frombetween the blocks, to prevent its being mislaid, andconnection with the…
Electricity · Magnetism
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