any real ac-curacy, it is desirable thatcurrent in the wrong direc-tion should be eliminated asfar as possible. This is neces-sary not so much because of any difficulty in the measurement ofcurrents which alternate in direction, but because it would be amisleading operation to measure currents of… … Fig. 8.—Milliampekemeteb. foeX-Ray Work (L. Miller). THE ELECTRICAL APPARATUS 21 ■—OSMO -REGULATEUH direct current galvanometer, but in working with an induction coilthe inverse current may be a serious source of errors in measure-ment, particularly if the coil is operated from a source of supplyat…
X-rays · Radiography
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