(from the article `Ericsson, John`) ...a plan for placing warship engines below the waterline to protect them against shell fire. In 1833 he exhibited his caloric engine, on which he ... ...model farms, orderly and prosperous communities, and fair dealing with outsiders. Their industry and ingenuity produced numerous (usually ... [2 ...
Found on
http://www.britannica.com/eb/a-z/s/50
A screw-propeller is an instrument for the propulsion of a vessel consisting of two or more oblique blades set on a shaft or shafts lying nearly parallel with the keel, and revolving beneath the water at the stern.
Found on
http://www.probertencyclopaedia.com/browse/RS.HTM
noun a propeller with several angled blades that rotates to push against water or air
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.
