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 ...

Brass model, scale 1:8, of the conoidal three-bladed propeller patented and made by George Rennie, Greenwich, Kent, England, 1839. This type of this type of screw propeller was fitted to the iron ...

THE author of this book is well known, both as a practising marine engineer and as an author. His “Manual of Marine Engineering” has long served as a text-book, and has passed through many editions.

THIS is a small book presenting “a simple exposition of the geometrical principles connected with the screw propeller, and illustrating the various ways in which these may be applied to obtain a ...

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THE event that settled the argument took place in April 1845. The screw-driven Rattler and the paddle steamer Necto , both ships of similar size and power, were joined stern to stern and engaged in a ...

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