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Scientific American, Vol. 87, No. 12 (1902) (1902)
leaf 4
et music roll, so that very little time is consumed in re- parts. The music roll, X, is mounted on bearings at valves which close the exhaust ports of tube, G, and rolling the music at the end of a piece. S, and the music sheet passes over the tracker-board, admit air through the inlet port under… … © 1902 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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