Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1336
he other isunwound. This arrangement corrects for any variation intemperature, for the effect on one spring would be counter-acted by the opposite effect on the other. The coil normallylies at 45° to the line joining the poles of the magnet, andconsequently the magnetic field created by a current… … Fig. 610 diagram of magnets, flux, coil and inner core of weston instrument
