THE earliest conception of an auxiliary motive power in navigation is contemporaneous with the first use of the wind; the name of the inventor, “unrecorded in the patent-office,” is lost in the lapse ...
On the comparative efficiency of single and twin-screw propellers in deep-draught ships, by W.H. White.--On the elementary relation between pitch, slip, and propulsive efficiency, by W. Froude.--On ...
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