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Scientific American, Vol. 28, No. 26 (1873) (1873)
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peed, a power required to drive fans is saved by reason of the slow volume of 100,000 cubic feet of air per minute. speed on which the Root blower does its work, from 100 to Referring to the mechanical arrangement, it should be The subject of our article is also largely employed abroad, The power,… … © 1873 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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