Oshima
a designation given to about 20 different localities in Japan. The most important of this name is an island about 100 miles long, reaching toward the Bonin Islands. It has a population of about 5,000. The chief industry is fishing. The name is also given to another island of the Luchu archipelago. This is about 34 miles long and 17 miles wide.
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Oshkosh
a city and county-seat of Winnebago co., Wis., on both sides of the Fox river, and on the Minneapolis, St. Paul and Sault Ste. Marie, the Chicago and Northwestern, and the Chicago, Milwaukee, and St. Paul railroads. Here are the court house, city hall, United States government building, public library, high school, School of the Deaf and Dumb, State Normal School, County Hospital for the Incurable Insane, the Northern State Hospital for the Insane, street railroad and electric light plant, waterworks, National and state banks, parks, and several daily and weekly newspapers. It has a large lumbering industry, manufactories of carriages and wagons, machinery, tobacand flour, and meat packing plants. co Pop. (1910) 33,062; (1920) 33,162.
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Oskaloosa
a city and county-seat of Mahaska co., Ia.; between Des Moines and Keokuk rivers, and on the Chicago, Rock Island, and Pacific, the Burlington Route, and the Minneapolis and St. Louis railroads; 62 miles S. E. of Des Moines. It contains Oskaloosa College (Christian), Penn College (Friends), a business college, preparatory and normal schools Is,, high school, public library, electric lights, National and state banks, papers. It is in a rich coal, iron, limeand a number of daily and weekly newsstone, and fire clay region, and has manufactories of iron and brass goods, iron furnaces, vitrified brick works, woolen goods and flour mills, etc. Pop. (1910) 9,466; (1920) 9,427.
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Osler
SIR WILLIAM. Physician and author. He was born in 1849 at Bondhead, Ontario, Canada, and graduated as M.D. from McGill University, Montreal, in 1872, after studying also in England, Germany, and Austria. On returning from abroad he taught pathology at McGill, and in 1884 was named professor of clinical medicine at Pennsylvania University and five years later of medicine at Johns Hopkins. In 1905 he went to live in England, and after six years' residence there was made a baronet, having lectured at Oxford and at St. George's Hospital, London. Osler was a voluminous essayist and wrote much on cancer, chorea, blood platelets, displaying much originality. He gained considerable notoriety by putting forty as almost the terminus to the age of human usefulness, but his extravagance on the one side was balanced by contributions in his special field on the other. During the World War he presided SIR WILLIAM OSLER over the medical departments of the British forces, and organized several medical units. His works include: " Histology Notes"; "Principles and Practice of Medicine"; "Cerebral Palsies of Children"; "Science and Immortality"; "Counsel and Ideals"; "An Alabama Student"; "A Way of Life." He died in 1919. OSMAN. See OTHMAN.
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Osmose
in chemistry, osmosis, the mixing of dissimilar substances through a porous diaphragm-a phenomenon due to the attraction which the liquids have for each other.
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Osmunda
in botany, fern royal, osmund royal, or flowering fern; the typical genus of Osmundeæ. Six are known. One, O. regalis, the common osmund OSNABRÜCK royal, or flowering fern, is the noblest of domestic ferns; the fronds are bipinnate, fertile at the top. It is frequent in boggy places and the wet morasses of woods in the W. of Scotland and the S. of Ireland. Found also in England, Continental Europe, Asia, and Canada. The powdered stem has been used successfully in rickets, the dose being three drachms. Sometimes this fern has been called bog onion. OSNABRÜCK, a town of Prussia; province of Hanover, in the valley of the Hase, 75 miles S. S. W. of Bremen. Its great Catholic cathedral, in the Transition style of the first half of the 13th and the town hall (1486-1512) contains lads. portraits of all the plenipotentiaries who here, Oct. 24, 1648, signed the peace of Westphalia. Osnabrück has important iron and steel works, and manufactures of railway plants, agricultural machinery, gas-meters, paper, tobacco, etc. It suffered much in the Thirty Years' War, (1618-1648), but recovered, thanks to its linen industry, during the eighteenth century. The name Osnaburgs given to coarse linens is derived hence. Pop. about 75,000.
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Osprey
or OSPRAY, in ornithology, Pandion haliaëtus, the fish hawk, bald buzzard, or fishing eagle. A bird of prey, of almost world-wide distribution, subsisting on fish. The osprey is about two feet long, with a wing expanse nearly three times as great. The plumage is dark brown, white on the under surface, AMERICAN OSPREY with a few streaks of brown on the throat; crown light brown edged with white, and a streak of dark brown from the eye to the shoulders. Ospreys nest usually near the seashore, and, unlike rapacious birds generally, are in some measure gregarious. In North America large communities of ospreys are found. They lay three or four eggs of a rich red to buffy white, with large reddish and brown markings.
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Ossa
the ancient name of a mountain on the E. side of Thessaly, near Pelion, and separated from Olympus by the vale of Tempe. The ancients placed the seat of the Centaurs and Giants in the neighborhood of Pelion and Ossa.
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Ossification
the formation of bone. In the growth of the skeleton of man and the higher animals, this process goes on naturally, and it occurs in the reproduction of new bones after the destruction or loss of old ones. Ossification also occurs as an unnatural or morbid process. It occurs most frequently in the cartilage of the ribs, after the 50th year; but in some cases it commences between the ages of 30 and 40. The cartilages of the windpipe are next to those of the ribs in their liability to become osseous. The disease called "ossification of the heart" is not an affection of the proper substance of that organ, but of its valves, in which earthy matter is sometimes deposited.
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Ossining
a village in Westchester co., N. Y., on the Hudson river, and on the New York Central and Hudson River railroad; 30 miles N. of New York. It is situated at the widest part of the river on ground rising to an altitude of 300 feet, and commands a fine view of many interesting points on the river. Here are military academies, street railroad and electric light plants, a portion of the Croton aqueduct, which is carried across Kill brook by a stone arch 88 feet wide and 70 feet high; National and savings banks, and several weekly newspapers. It has manufactories of lime, sleighs, carriages, cotton gins, steam engines, gas and water pipe, etc. A State penitentiary, one of the most famous of American prisons, is located here. On this account, after many attempts to have its former name, Sing Sing, changed, the Legislature in 1901 granted this privi- pr lege and the lege, and the name Ossining was adopted. Pop. (1910) 11,480; (1920) 10,739.
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