1 — i W* A.- JirA/. mo &mroc&xB ids ii®w81ot,j&ot jotok&x ®s scxsisim; bbghabxcax, &na hxsb isibiiitsuxrs. [NUMBER 35. VOLUME VII.] NEW-YORK, MAY 15,1852; ed with the rack so as to make each blade oc- Scientific American, cupy the same position in relation to the axis IMPROVEMENT IN SCREW… … on the pivot, c', of blade D'. The blade, D, volutions of the propeller stopped, it will act as the Lake trade, as well as that of central and The accompanying engravings are views of is the one which is intended to serve for a rud- a rudder, in case of the vessel's rudder being western New York.…
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