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Scientific American, Vol. 33, No. 18 (1875) (1875)
leaf 3
American Patent Agency ment is mosaic. One of these countershafts can be seen in operation at the February 16, 1875. For further information, address the The wards are about 80 feet long by 28 feet wide, and 13 Fair of the American Institute. For circulars and particu- inventor, Mrs. Harriet Gray,… … © 1875 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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