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 1056
whirling motion aroundits axis^ which latter does not change, see Figs. 421 and422. When a current passes through a spiral conductor, asshown in Fig. 423, in the direction indicated by the smallarrows, the direction of the lines of force produced willbe as indicated by the large arrow; but if,… … Fig. 423 • direction of lines of force produced by a circular currentThere are, then, surrounding a conductor carrying acurrent of electricity, an infinite number of lines consti-tuting in fact a volume of force, and the strength of thisvolume, or field, varies with its nearness to, or distancefrom…
