, while ally from being directly fore and. aft when far- vessels, a system which is both new and ingenious. by turning the shaft through 180 degrees the motion thest a-port and farthest a-starboard to being most If an inventor should try to imitate artificially the of the vessel can be reversed.… … the driving thrust of the pendulum area is bound to oscillate in accord- ance with the law of harmonic mo- propeller was greater than the screw SHOWING SHAFT. tion. When these propellers of nature propeller, and that the maneuvering oscillate, they communicate lateral as ability was greater than…
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