"ey NUMBER 47. VOLUME XI. THE Scientific American, PUBLISHED WEEKLY … and engine house, and obtaining any desira- the proper balance is obtained. Lisa screw the side frames, I; the studs support shafts, Improved Platform Weizhin: Scale? ble length of stroke by merely adding to the —_—}$. |, |] OO eS weight for the finer divisions of fractions— A, upon knife edges, a.…
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