Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 263
contact with the bottom of the holes, and by these the pins are lengthened or shortened so as to adjustthe tops very truly with the drum teeth revolving beneath them ; h, is a small cylinder, and i anothercylinder, both of which are covered from end to end with narrow strips of card laid on…
Mechanical engineering
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