Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 68
2. Of what forces have you evidence 1 Repeat the experiment, holding each pole to the south-seeking pole of the suspended needle. Experiment 7. Place the two suspended needles so that the north-seekingpole of one shall be near the south-seeking pole of the other. 1. Do you find one or both needles… … Fio. 39. which an electric current is flowing, first above and thenbelow a compass needle (Fig. 39). 60 PHYSICAL SCIENCE. An electric current may be obtained by placing a copperand a zinc plate in a vessel containing dilute sulphuric acid inthe proportion of about ten parts of water to one of acid,…
Physics
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