t the rotation of the first inventions,” continues the report, “are frequently improvements which will overcome some of the or forward propeller gives the water at the stern a presented in the form of translations made by per: difficulties inherent in the present type. rotary or whirling motion,… … Few persons, are decided comparatively, structural ad- are capable of translating a technical description so best-known existing forms by the fact that it has no vantages in placing two propellers on the center line that it shall mean exactly the same in a foreign stationary parts other than the…
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