Two swimming strokes -- one that pulls through the water like a boat paddle and another that whirls to the side like a propeller -- are commonly used by athletes training for the Olympic Games.

for it is susceptible of a more complete protection than the paddle, and of an easy and advantageous combination with canvas. The screw-propeller, in fact, has assumed so important a part in all ...

THE screw-propeller was practically applied to steamships by John Ericsson and Francis Petit Smith about seventy years ago. It speedily became formidable rival to the paddle-wheel. Long ago it ...

The eventual dominance of screw propellers over paddle wheels was not even driven by technological considerations, but rather by a tug of war between a paddlewheel propelled vessel and a screw ...

and that his propeller is not in use in England at all. The first inventor of the screw propeller in America, was Col. John Stevens, of Hoboken, the father of Ro-beitL. Stevens, of thiscity.