dottife mttiiim sin Ai¥ss^i3S m zaxnrsraT. am smmAZ m sgsbixkeec sKMiAsxeAK aib hebea xsraMYsan&m. [NUMBER 32. NEW-YORK, APRIL 24,1852. VOLUME VTI. so as to admit of the shaft tumbling with the TflJB IMPROVED ROTARY STONE-CUTTING MACHINE—Pig. 1 Scientific American, rock shaft. The shaft, H,… … moved under the cutters sufficiently fast to let through which this road passes, though com- between the upright posts of the main frame. Figure I is a side elevation, and figure 2 is the cutters act upon a new surface every cut. paratively new, is increasing in population and C C are screws…
