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1741–1820, English agriculturist. His writings hastened the progress of scientific farming. He traveled widely, always observing techniques of farmi...
(Charles Elwood Yeager), 1923–, American aviator. A fighter pilot during World War II, he was a test pilot during the early postwar years. Among oth...
1834–1908, American astronomer, b. Hanover, N.H., grad. Dartmouth, 1853. He discovered the reversing layer of the solar atmosphere and proved the ga...
(yûr´k z, –k s) (KEY) , 1837–1905, American financier, b. Philadelphia. He began his business career as a clerk in a Philadelphia grain commissi...
(y n) (KEY) , Mandarin Yen Yang-chu, 1893–1990, Chinese educator, b. Sichuan prov., China, educated at Yale (B.A., 1918) and Princeton (M.A., 1920) ...
(yäk t´ äl-hämäw ´) (KEY) , 1179–1229, Arab geographer. Born in Byzantium, he was bought as a slave by a merchant, al-Hamawi. He was freed on ...
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