Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 343
new and whole. Whatthus began in sheer wear, or accidental damage, is now imitated 292 OBSERVATION of set purpose. Under the equator one may often see small craftwhose sails are matting woven with large openings, as the sailorssay to let out the wind. The mariners ofCarthegena, St. Thomas, and… … Perforated sails. I, jib. 2, stay-sail. 3, square sail. 4, top sail. 5, sloop with perforated sails. vertical breadths laced together so as to leave large aperturesfree to the air. Why is this breeziness of structure profitable?Because against the concave surface of an ordinary sail the…
Inventions · Inventors
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