Biography Category
1811–75, American inventor, b. Rensselaer co., N.Y. As a child he lived in Oswego, N.Y. He patented in 1851 a practical sewing machine that could do...
(s d´ ) (KEY) , 1877–1956, English chemist. He worked under Lord Rutherford at McGill Univ. and with Sir William Ramsay at the Univ. of London. Aft...
polymer in which atoms of silicon and oxygen alternate in a chain; various organic radicals, such as the methyl group, CH3, are bound to the silicon a...
1779–1849, and James Smith, 1775–1839, English parodists, brothers. They wrote the famous Rejected Addresses (1812) which burlesqued such contempo...
act of swimming freely underwater. It is done with the aid of a face mask, swimming fins for the feet, and either a snorkel breathing tube or scuba [a...
sport of sliding over snow on skis—long, narrow, flexible runners. Water skiing is a warm-weather sport in which a motor-propelled craft tows a skie...