Collins, A. Frederick (Archie Frederick), 1869- · New York, London, D. Appleton and company · leaf 98
ircuit. If we place a compassneedle near the steel barmagnet the needle will turnin the same direction as themagnetic lines of force areflowing, and it will, there-fore, point to the north andto the south poles of themagnet. Now the Earth is agreat magnet with a posi-tive pole, which we call… … Fig. 86.—Lines op Force aroundthe Earth. ^h /ft ^WATCH SPRING Fig. 87.—Watch Spring—Needle for Compass. surface from the north pole to the south pole, and a compass needleplaced anywhere on the Earth will swing round until it is inthe same direction as the lines of magnetic force. How to Make a…
Astronomy · Stars
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
