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LEFT CORBAL 160 COBREZE are of two kinds, (1) colored corpuscles, known also as the red particles or the red globules; and (2) the colorless, known also as the white or pale cor- puscles. The former are the more nu- merous. The colored corpuscles are not really globular; they are flattened or discoidal, the outline being circular. In most mammals the corpuscles are like those of man. In the camel, how- ever, they are elliptical in outline. In birds, reptiles, and most fishes they are oval disks with a central elevation on each side. Those of the invertebrata are, as a rule, not colored, the annelids alone being an exception. COBBAL, in South America and else- where, a yard or stockade for cattle. COBBEGGIO, ANTONIO ALLEGBI (ko-redg'yo), commonly called CoRREG- GIO from his birthplace; born in 1494, and appears to have first studied paint- ing under Tonino Bartolotto of Correg- gio; in 1519 he was established as a painter at Parma. The celebrated cupo- la at Parma was begun in 1520, and in 1522 he undertook the great works of the dome of the cathedral; in the former representing the ascension of Christ, and in the latter, the assumption of the Vir- gin, both of which series are now ad- mirably engraved by the Cavalier Toschi. The frescoes of the cathedral, left un- finished by Correggio, were completed by his pupil, Giorgio Gandini. Correggio died at his native place in 1534. His great reputation rests chiefly on the above-mentioned frescoes; but he had executed many excellent oil pictures be- fore he proceeded to Parma in 1519. The "Night," of Correggio, in the Gallery of Dresden, is a picture of the nativity of Christ, in which the light proceeds from the body of the infant Saviour. COBBEGIDOB, a small island com- manding the entrance to Manila bay, P. I. It has an area of 2 square miles, rising abruptly from the sea to a height of 635 feet. There is a lighthouse at the summit. The island was strongly forti- fied by the Spaniards in the 18th cen- tury, but the defenses were not kept up. "When Admiral Dewey made his dash into Manila bay, May 1,1898, he steamed past this island, which was supposed to be very strongly fortified. The forts have been strengthened by the United States Government, which established an arsenal here in 1900. Pop. of San Jose, the only town, 500. South of Corregi- dor is the smaller island of Caballow, separated by a narrow strait. CORRESPONDENCE SCHOOLS, schools in which instruction is given by mail to those students who are unable to attend schools and college, either be- cause they cannot afford to stop remuner- ative labor or because they are too far distant from any good school. Under the system the student, after the payment of fees, receives textbooks and lessons by mail from the institution, returns the completed exercises, and receives them back, corrected and marked. This type of instruction presupposes on the part of the student a conscientious desire to learn and a willingness to work. Such students have been greatly benefited by the correspondence schools. In 1868 the University Extension move- ment was started in England, the object being to give to mature men and women, who had been deprived of any education in early life, some op- portunity to acquire knowledge of science and literature. Probably from this in- stitution, adopted in America in 1873, arose the first correspondence university at Ithaca, N. Y. For a time the Chau- tauqua, under President William Rainey Harper, undertook to educate by corre- spondence, but abandoned it when some of the Western universities, such as Wis- consin and Chicago, took over this task. Many of the great Western universities have courses which can be taken by cor- respondence, and by adopting this method of instruction the State universities gain a hold upon the people of the common- wealth, which in part accounts for the generous support given them by the State Legislatures. One of the most successful correspondence schools in the United States is a private institution, the International Correspondence Schools, lo- cated at Scranton, Pa. Not only are the regular college courses offered by this school, but virtually every vocation or trade can be learned by correspondence with this school. In fact, the larger proportion of its students are learning trades, the number of its students who are doing college work being compara- tively small. CORREZE, (ko-raz'), a French de- partment, formed out of part of the old province of Limousin, and taking its name from a river, the Correze, flowing 52 miles S. W. to the Vezere. Area, 2,272 square miles. Pop. about 300,000. The chief rivers of Correze are the Dordogne, the Vezere, and the Correze. The sur- face of the department is mountainous, especially in the N. and E., where it is broken in upon by offsets from the Auvergne Mountains which, in Mount Odonze, attain a maximum altitude of 3,129 feet above the sea. The lower slopes are clad with forests, but the dis- trict is in general sterile. Minerals, par- • ticularly coal, iron, lead, alabaster, and