Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 166
ter surrounding this screw is notable to flow away from it, but that the screw works through the water asthe nail does in the wood,—he will have no difficulty in understanding that,under such circumstances, if the screw were made to revolve, it would ad-vance and carry the vessel with it. The… … and supposing also that only a very short piece of the screw is used—saythe length of one revolution—and that this is placed in the dead-wood.Such was the construction of the earlier screw-propellers, but now a stillshorter portion of the screw is used ; for instead of a complete turn of thethread,…
Inventions
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