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TENCIN 294 TENERIFE, PEAK OF "Memoirs of the Comte de Comminges" <1735), "The Siege of Calais" (1739), and •The Misfortunes of Love" (1747), show taste, passion, and style. Madame de Tencin's "Correspondence" with her brother appeared at Paris in 1790; the "Letters to the Due de Richelieu" in 1806. She died in Paris, Dec. 4, 1749. TENDER, in law, an offer of money or other thing in satisfaction of a debt or liability. Legal tender, coin or paper money, which so far as regards the na- ture and quality thereof, a creditor may be compelled to accept in satisfaction of his debt. In this country gold and sil- ver coin are a legal tender to any amount, so far as a debt admits of being paid in gold or silver; and national treas- ury notes or greenbacks are also legal tender. Plea of tender, in law a plea by defendant that he has been always ready to satisfy the plaintiff's claim, and now brings the sum demanded into court. Tender of amends, in law, an offer by a person who has been guilty of any wrong or breach of contract to pay a sum of money by way of amends. TENDON, the white fibrous tissue reaching from the end of a muscle to bone or some other structure which is to serve as a fixed attachment for it, or which it is intended to move. Tendons have been divided into (1) Funicular, or rope-like, as the long tendon of the bi- ceps muscle of the arm. (2) Fascicular, as the short tendon of that muscle and as the great majority of tendons gener- ally. (3) Aponeurotic or tendinous ex- pansions, sometimes of considerable ex- tent, and serviceable in strengthening the walls of cavities, as, for example, the tendons of the abdominal muscles. The tendons commence by separate fascicles from the end of each muscular fiber, and they similarly terminate by separate fascicles in distinct depressions in the bones, besides being closely incorporated with the periosteum. In some birds whose tendons are black the periosteum is black also. If a tendon is ruptured by an accident, or divided by the surgeon (tenotomy), the two ends, if not too far separated, unite with extreme readiness, by the formation of intervening plastic material, which soon acquires great firm- ness. The tendons most frequently rup- tured are the Achilles Tendon {q. v.), and tendons of the rectus femoris and the triceps humeri. Among the diseases of tendons are in- flammation and one of the forms of whit- low known as paroivychia gravis, or ten- dinous whitlow. Fibrous tumors and small cartilaginous enlargements are often found in tendons. TENDRIL, in botany, a curling and twining thread-like process by which one plant clings to another body for the pur- pose of support. It may be a modifica- tion of the midrib, as in the pea; a pro- longation of a leaf, as in Nepenthes; or a modification of the inflorescence, as in the vine. They have been divided into stem tendrils and leaf tendrils. Called also cirrhus, and by the old authors capreolus and clavicula. TENEDOS, an island of Greece, on the W. coast of Asia Minor; 15 miles S. W. of the Dardanelles, about 6 miles long and 3 miles broad. The channel which separates it from the mainland is 3 miles broad. The interior of the island is very fertile, and is remarkable for the excel- lence of its wines. Corn, cotton, and fruits are also produced. On the E. side of the island, near the sea, is the town of Tenedos. It was occupied by Greece during the Balkan War and by the treaty with Turkey in 1920 became a Greek possession. Pop. about 5,000. TENEMENT HOUSE, a house divided into tenements occupied by separate fam- ilies. In tenement houses the landlord does not usually reside on the premises. Apartments are let in suites and single rooms. Owing to their crowded condi- tion these houses present problems of sanitation impossible of solution, and are breeding places of disease and nurseries of plagues in times of epidemics. In some cities tenement houses are under police surveillance, and stringent laws have been enacted to secure sanitary con- ditions and to prevent over-crowding, but their existence is still a problem that sociologists have vainly tried to solve. TENERIFE, PEAK OF, or PICO DE TEIDE, a famous dormant volcano, the highest summit in the Canary Islands (q. v.), in the S. W. of the island of Tenerife, 12,200 feet above sea-level. The lower slopes of the mountain are covered with forests, or laid out in extensive meadows, yielding rich grass; but the upper ridges and peak, properly so called, are wild, barren, and rugged in appearance. The Peak El Piton and its two inferior neighbors, the Montana Blanco and Chahorra (9,880 feet), rise from a rugged circular plain of lava debris and pumice, 7,000 feet above sea- level, about 8 miles in diameter, and fenced in by an almost perpendicular wall of rock. From the crevices sul- phurous vapors are constantly exhaling. The wall of the crater at the top is formed of broken and jagged porphyritic lava rocks, is elliptical, 300 feet in diame- ter, and 70 deep. The color of the whole