nie cH bn Ik dl " al THE ADVOCATE OF INDUSTRY, AND JOURNAL OF SCIENTIFIC, MECHANICAL AND OTHER IMPROVEMENTS. (NUMBER 24. NEW-YORK, MARCH I, 1851. VOLUME 6.] inner end ef the line shaft, C. D is a sliding THE pedestal, which can be raised or lowered by Scientific American, the lever, E. When raised… … to the small end of the lower cone, where it struction is very moderate, considering the The improvements embraced in this inven- fer to like parts. Mr. Birkett claims itas a difficulties of the work, and the manner in attains the maximum of velocity, and then valuable improvement on the English…
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