Fourchette

[Fr., a fork.] ( Anat. ) The posterior commi ure of the labia major a. (Surg.) An instrument used for supporting the tongue during the operation of dividing the frænum. Four Cor'ners, in Iowa , a post-office of Jefferson co. Four Corners, in Maryland , a village of Montgomery county. Foureroy, ANTOINE FRANÇOIS DE, ( foor'krór ,) a French chemist and natural philosopher, B. at Paris, 1755. Having chosen the medical profe ion for his occupation, he devoted himself to the study of those sciences which are more immediately connected with it, especially chem- istry. In 1784 he was appointed profe or of this science at the Jardin du Roi, and became a ociated with Berthollet, Lavoisier, and others in researches which led to vast improvements, whilst they suggested the new chemical nomenclature, entitled Methode de Nomenclature Chimique . On the breaking out of the Revolution, he became entangled in the politics of the period, and was elected a deputy from Paris to the Na- tional Convention. In 1794 he became a member of the Committee of Public Safety, and next year was received as one of the Council of the Ancients. In 1799 Bona- parte gave him a place in the Council of State, when the affairs relating to public instruction were placed under his management. In this important trust he ably ac- quitted himself. In the various departments of chem i- cal science and natural philosophy, he produced many valuable works. D. 1809. filled with water, and B with air. In this disposition of the apparatus, let water be poured into the basin C; this will descend through the pipe ab , and gradually fill the ve el B. But as it rises in B, the air in that ve el es- capes through the pipe cd , and is compre ed at the top of A, and, by its spring or elasticity, forces the water through the tube ef , and thus produces a jet at f, which will continue until the ve el A is nearly emp- tied, or B nearly filled. The force which produces the jet is equal to the pre ure of a column of water, the height of which is equal to the difference of the levels of the water in Cand B: according to this theory, -n. Four times as much. therefore, the water should spout to a height above its -v. a. To make fourfold, as an a e ment. level in A equal to that distance; but its friction against Four'footed, a . Having four feet. Fourdrin'ier. See PAPER (MANUFACTURE OF). Four Evangelists, part of a larger group of islands known as the Twelve Apostles , lie off the west entrance of the Strait of Magellan. They are abt. Lat. 52° 34′ S., and Lon. 75° 5' W. The eight other islands, with which they are cla ed as above, run abt. 15 m. further out into the Pacific.