Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 65
blowsimply assisting the molecules to turn around according to the molecular theory. In alike manner tests made witha compass needle on iron andsteel girders in buildingsunder construction, will showthat the bodies have beenmagnetised by the inductiveaction of the earths field.It seems probable… … Fij 63.—Plan of Compass Card andBowls. Index to Figs. 62 and 63. CB represents Compass Bowl and Card.JXJ2 represents Compass Bowl Journals.GR represents Gimbal Ring.J3J4 represents Gimbal Ring Journals.BB represents Binnacle Bowl.I represents Lubber Line (Fig. 62.) S-position, due to the earths…
Electricity · Magnetism
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