— Fa Aste fe RAR ae et _—ea OE MARR A Ne re VOLUME 6.] LINUMBER 46. AUGUST 2, 1851. NEW-YORK, TRE the one side of a vertical line drawn through Scientific American, the centre of the shaft nearer thereto than it CIRCULATION 16,000. is on the opposite side, and its curvature or PUBLISHED WEEKLY… … Springfield to the Illinois river, and the Alton the said horizontal line being made exclusive- The accompanying engravings represent a is produced by either roller alternately, having and Sangamon Railroad. This latter road ly the fulcrum or impelling surface, which new Rotary Engine, invented by…
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