Stewart, Balfour, 1828-1887 · Toronto : James Campbell · leaf 136
e horizontally upona pivot. It will point nearlynorth and south. But let us waw bring near it a wire BODIES.] PHYSICS. 125 through which a current is passing, and it will befound that the needle will no longer point !>orth andsouth, but it will place itself so as to lie across or atright angles… … as is sketched in the above figure. Let us sup-pose that w-e have our battery at one end of theroom, while two wires covered with thread are carriedfrom the two poles of the battery qui^e to the otherend of the room, and are there joined together, so thatthe battery is now in action. Furthermore…
Physics
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