The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 260
of these, likepoles and attraction between the unlike, causes the wire-archto revolve half way round, which brings the other junctionwithin the flame; the current is now reversed, and the facetowards the north pole of the magnet acquires north polarity,and is again driven through a semi-revolution;… … Describe the Thenno-Electric Arch. State the experiments with this. THEORY OF THE EARTHS MAGNETISM. 255 Opposite side of the magnet, the direction of the current wil] besuch that the south pole of the arch will be presented to thenorth pole of the magnetj and no revolution, consequently,…
Physics
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