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Scientific American, Vol. 87, No. 12 (1902) (1902)
leaf 4
eet passes over the tracker-board, admit air through the inlet port under disks, #. The With the foregoing details in mind we can clearly B, to the winding roll, 7. The tubes, C, which have tube, G, bears the same relation openings in the tracker-board, lead down to their re- to the secondary… … © 1902 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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