Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 259
ed in a somewhat unusual way in an occur-rence first observed bv Trevelvan. when a hot solderino- ironwas laid against a piece of lead. The experiment is bestexhibited by means of the apparatus shown in Fig. 171. The piece A. called the rocker, is made of brass, andgrooved on one face so as to… … Fig. 171. edo-e to the other for a lonsf time, emittino- a definite musical •J CD CD note. The explanation is that when one of the hot edo^smeets the surface of the lead, which has a large coefficientof expansion and a relatively small conductivitv. a lump israised with sufficient rapidity to tilt…
Physics
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