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Scientific American, Vol. 65, No. 4 (1891) (1891)
leaf 4
shaft carrying a puiley connected by a belt with the mechanism to be driven, in the illustra- in width with the interiorof the trough. It is made of roads of this country. A good example is now in ope- ration upon the Pennsylvania Railroad about one mile tion represented by a fan. On the outer end… … © 1891 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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