United States National Museum, Smithsonian Institution, United States. Department of the Interior · Washington : Smithsonian Institution Press, [etc.]; for sale by the Supt. of Docs., U.S. Govt Print. Off. · leaf 282
Figure 49. — Ritchie’s motor. From Philosophi- cal Transactions of the Royal Society of London, 1833, vol. 123, p. 316, pi. 7. polarization and secondary action, as was true of all its predecessors. Beginning in the middle 1830’s chemical cells were being invented that avoided the polarization and…
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