Screw Propellers and Marine Propulsion (Classic Reprint)

Excerpt from Screw Propellers and Marine Propulsion

The propelling screw is, in all probability, a very ancient contrivance. The date of its first application as an instrument of propulsion remains in oblivion, but it is said to have been known in China at a very early period. But it is in its connec tion with steam as a motive power to propel vessels that the following pages are chiefly devoted.

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