Iles, George, 1852-1942 · New York : Henry Holt and company · leaf 38
se in their number and a consequent diminution oftheir diameter. Indeed, it is absolutely necessary to have atleast two revolving in opposite directions to prevent thetendency to rotation which a single wheel gives to a boat. Since you were here I have made a fair experiment onthe wheel compared… … TiiK Twin-Screw Propeller ov 1804[From a photograph of the rebuilt boat containing the original machinery.] JOHN AND ROBERT LIVINGSTON STEVENS 15 cient number of trials the wheel was taken off and thesame men were furnished with oars. The result of re-peated trials was a few seconds in favor of the…
Inventors
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