Stewart, Balfour, 1828-1887 · Toronto : James Campbell · leaf 134
orizontally upon a pivot. It \vill point nearlynorth and south. But let us now 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 north andsouth, but it will place itself so as to lie across or atright angles to… … Q^ Fig. 48. as is sketched in the above figure. Let us sup-pose that we have our battery at one end of theroom, while two wires covered with thread are carriedfrom the two poles of the battery quite to the otherend of the room, and are there joined together, so thatthe battery is now in action.…
Physics
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