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Scientific American, Vol. 56, No. 2 (1887) (1887)
leaf 8
their opera- hind brush, while the one in front carries them further tion. The apparatus under consideration is one of the best along. The same operation is effected between each succeeding pair of brushes, in a continuous, regular, of its kind, and one of the least complex, considering and rapid… … belt. BEETS, © 1887 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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