pro- momentum to the air by running at a great velocity, but by running parts. duction of the Boot rotary blower. Prom the illustration, regular displacement of the air at each revolution, whether the reader will perceive not only the excellent internal ar- driven fast or slow; in this respect it… … 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, 200 revolutions per…
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