Rock Hill
a city of South Carolina, in York co. It is on the Southern railroad. It is the center of an important cotton growing and agricultural region and its industries include cotton mills, wagon factories, a fertilizer factory, brick works, foundry and machine shops. It has power developed from the power plant on the Catawba and Broad rivers. It is the seat of the Winthrop Normal and Industrial College of South Carolina, and has a public library brary and a hospital. Pop. (1910) 7,216; (1920) 8,809.
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Rock Island
a city in Rock Island co., Ill.; on the Mississippi river, and on the Burlington Route, the Chicago, Milwaukee and St. Paul, Chicago, Burlington and Quincy, the Davenport, Rock Island and Northwestern, the Rock Island Southern, and the Chicago, Rock Island and Pacific railroads; 80 miles N. W. of Peoria. Here the Mississippi is spanned by a railroad bridge which cost $1,300,000. The city derives its name from a beautiful island in the river, which belongs to the United States, and is used by the Federal government for a great central arsenal, a large armory and foundry. A dam across the river furnishes abundant water power. Before and during the Black Hawk War there were block-house forts on this island, and during the Civil War the prison here was the place of detention of many Confederate prisoners. The city contains waterworks, street railroad and electric light plants, Augustana College and Theological Seminary (Luth.), National and State banks, and daily and weekly newspapers. It has lumber mills, foundries, machine shops, manufactories of farming implements, soap, glass, stoves, etc. Pop. (1910) 24,335; (1920) 35,177.
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Rock of Chickamauga
a name applied to Gen. George H. Thomas, U. S. A., on account of his heroic stubbornness in holding his position at Chickamauga during the Civil War, in September, 1863. See THOMAS, GEORGE H.
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Rock Pigeon
a pigeon that builds its nest in hollows or crevices of rocks and cliffs, especially the Columba livia.
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Rock River
a river of the United States, which rises in Wisconsin, 50 miles W. of Lake Michigan, and falls into the Mississippi 2 miles below Rock Island city; length, 330 miles, about 225 of which have been ascended by small steamboats.
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Rock Snake
a name sometimes given to any individual of the genus Python. Rock snakes are among the largest of living reptiles; specimens of 18 and 20 feet long have been brought to the United States. They kill their prey by constriction, and swallow it whole, commencing with the head.
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Rock Springs
a city of Wyoming, in Sweetwater co. It is on the Union Pacific railroad. In the neighborhood are important coal mines and it is also the center of an important farming and cattle raising region. The notable buildings include a State hospital, government building, public library, city hall, Elks' build ing and a Masonic Temple. Pop. (1910) 5,778; (1920) 6,456.
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Rock-crusher
A mill for breaking and crushing rocks; it may also be used for pulverizing quartz, gold or silver ores, plumbago, Portland cement, rosin, foundry facings, etc. Some of the machines used for this purpose will work either wet or dry, and deliver a finished product. Their capacity is 3 to 4 tons per hour on phosphate rock, 1 1/2 to 2 tons per hour on Portland cement, quartz, or ores, depending on hardness of material to be pulverized and fineness of product, and will grind from 30 to 250 mesh with equal facility. See SAND-PULVERIZER.
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Rock-crystal
A common name for the finest and purest quartz or transparent, crystallized silica. The pebble lenses for spectacles, etc., are made from rock-crystal. See QUARTZ; SILICA.
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Rock-sand
The name given to all moulding-sands obtained by pulverizing the rock; their value is regulated according to the durability they possess. The new red-sandstone is preferable for this purpose, as its nature is refractory, and it may by artificial means be made to answer nearly every description of mould. See FACING-SAND; CORE-SAND; etc.
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Rockefeller
JOHN DAVISON, an American capitalist; born in Richford, Tioga co., N. Y., July 8, 1839. He engaged in business when he was 16, and soon showed ability in detail and discretion in management. When discoveries of petroleum roused speculative interest in 1860, he owned a refinery in Cleveland, O. In 1870 he became president of the Standard Oil Company, a monopolistic corporation, and through which he accumulated immense wealth. He made large donations to educational institutions, notably to the University of Chicago, to which he has given in all JOHN D. ROCKEFELLER, SR. about $23,000,000. In 1902 he founded the General Education Board (q. v.) to promote higher education, and later established the Rockefeller Foundation (q. v.) and the Rockefeller Institute for Medical Research (q. v.) In November, 1920, he founded the Laura Spellman Foundation, in memory of his wife, with an endowment of $65,000,000.
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Rockefeller (II)
JOHN DAVISON, JR., an American capitalist. He was born in Cleveland, O., in 1874, the son of a father generally recognized later as the richest man in the world. He studied privately and at Brown University, from which he graduated in 1897. He then became associated with his father in his business enterprises and took particular charge of the philanthropic activities associated with his name. He became a director of the Colorado Fuel & Iron Co., American Linseed Co., and Merchants Fire Insurance Corporation. He is a member of the Rockefeller Foundation, the General Education Board, the Rockefeller Insti tute for Medical Research, the Bureau of Social Hygiene, and the International Health Commission. During the war he made large donations for the relief of suffering.
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Rockefeller (WILLIAM an American capitalist)
WILLIAM, an American capitalist, brother of John D. Rockefeller, born at Richford, N. Y., in 1841. He joined his brother in the oil refining business in Cleveland and from 1865 to 1911 was in charge of the New York business of the Standard Oil Company of New Jersey, and was at the same time president of the Standard Oil Company of New York. He was a director of many important banks, railroads, mining corporations, etc.
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Rockford
a city and county-seat of Winnebago co., Ill.; on the Rock river, and on the Illinois Central, the Chicago, Milwaukee, and St. Paul, the Burlington Route, the Chicago, Milwaukee and Gary, and the Chicago and Northwestern railroads; 85 miles W. of Chicago. Here are a United States Government building, es Rockford College, high school, business college, waterworks, electric lights, hospitals, sanitariums, public library, several veral National banks, and a number of daily and weekly periodicals. The city has extensive manufacturing interests, including large reaper factories, paper mills, flour mills, cotton and furniture factories, woolen mills, a large watch factory, and over 200 smaller factories. Pop. (1910) 45,401; (1920) 65,651.
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