(NUMBER 32. VOLUME VIL] ° so as to admit of the shaft tumbling with the THE Scientific American, rock shaft. The shatt, H, projects a short dis- tance through the cross-piece of the frame, B, CIRCULATION 16,000. … moved under the cutters sufficiently fast to let through which this road passes, though com- between the upright posts of the main frame. Figure 1 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 Care screws working…
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