A course of experiments in physical measurement (1897)
Whiting, Harold, d. 1895 · Boston, D.C. Heath and Co. · leaf 482
eful for measuring battery currentsis represented in Pig. 228. It consists of a woodenbobbin, fffpn, with two grooves,in each of which are wound 50turns of No. 16 insulated copperwire. Small holes are boredthrough the bobbin at/,^, n, andp, so that it is possible to measuredirectly the inner and… … 452 ELECTRICAL CURRENT MEASURE. Exp. 80. are connected by No. 31 spring brass wires (cA andmo) to a fixed point beneath, o, and to the centre (c)of a knitting needle {bd), as in the torsion balance (seeFig. 176, Tl 165). The length of the wire should betaken so that the coefficient of torsion of…
Physics
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