Gage, Alfred P. (Alfred Payson), 1836-1903, Fessenden, C · Toronto : W.J. Gage · leaf 237
bent in a U-shape(A, Fig. 138), and then it iscalled a horse-shoe magnet.Sometimes two iron rods areused, connected by a rectan-gular piece of iron, as a, inB of Figure 138. The methodof windino- is such that if the iron core of the horse-shoe werestraightened, or the two spools were placed… … XXX. ELECTRICAL MEASUREMENTS. The wonderful developments of electrical science in recentyears are rJmost wholly due to a better understanding of whatelectrical measurements can and ought to be made, and how tomake thom. Most of this increased knowledge has l)een gainedsince the first Atlantic cable…
Physics
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