Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 552
e glass at convenient pointswith the end of a lead-pencil.The filings arrange themselvesin lines radiating from eachpole. Experiment 3. — Suspenda small magnetized cambricneedle by a fine thread at itscenter and carry it aroundthe disk (Fig. 415). Theneedle passes through all thephases stated in… … Fig. «5. The last experiment presents a true exhibition, on a smallscale, of vfhat the earth does on a large one, and therebypresents one of many phenomena which lead to the conclu-sion that the earth is a magnet. In other words, thesephenomena are just what we should expect if a huge magnetwere…
Physics
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