Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 235
denotethe E.M.F. of the cell, we shall have E=I (B + r), t E 2l6 Electricity, [Book III. 146. Measurement of Resistance.—To measure a re-sistance we have to compare it with a certain standard resist-ance, which we will assume to be that of a certain measuredlength of standard wire at a certain… … Fig. 132. multiples of the length of the standard wire which gives oneohm resistance. These are issued in boxes of what are calledResistance Coils. Each coil is made of carefully insulated wire,folded in the middle and coiled round double, as shown in Aand B, Fig. 132. The terminals of each wire…
Electricity
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