The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 507
its plane in the magnetic meridian. For best proportions of tangent galvanometer coils see Bobbins. Tangent Scale. An arc of a circle in which the number ofgraduations in any arc starting from zero are proportional to thetangent of the angle subtended by such arc. The system is for usewith tangent… … 310, Graphic Construction of Tangent Scale. Thus the scale instead of being divided into degrees is divided intoarcs of varying length, growing shorter as they are more distantfrom the zero point, of such length that the first division beingsubtended by a tangent of length i; the first and second…
Electricity
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