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Scientific American, Vol. 69, No. 22 (1893) (1893)
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have been in constant use from twelve to The cells are readily charged. The manner in which at the southeastern corner of the Agricultural build- fourteen hours a day on one charging, and the cost of ing, in the South Pond, 30 boats being on the left in this is done is shown in the illustration. A… … © 1893 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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