DOLOMITE 395 DOME States Senator to fill an unexpired term. He was elected to the Senate from 1901 to 1907, and from 1907 to 1913. He was one of the most powerful and aggressive of the progressive group of Senators which opposed the conserva- tive or reactionary policies of the Repub- lican party. His efforts against the Payne-Aldrich Tariff Bill in the Senate in 1910 hastened his death which oc- curred in the same year. DOLOMITE (named after D. Dolomieu, a French mineralogist) , a brittle sub- transparent or translucent mineral, of a white, reddish, or greenish-white, brown, gray, or black color, with a vitreous lus- ter. There are numerous varieties. Dolomite constitutes extensive strata, with limestone strata, in various regions, M. Dolomieu in 1791 announced its marked characteristics, its not efferves- cing with acids while burning like lime- stone, and soluble after heating in acids. DOLOMITE MOUNTAINS, or DOLO- MITE ALPS, a group of European mountains belonging partly to Tyrol, partly to north Italy, and having the Piave and Rienz on the E., the Adige and Eisack on the W. They are named from the prevalence of the mineral dolo- mite. The highest summits are Palle di San Martino (10,968 feet) ; Sorapiss (10,798), and Monte Tofana (10,715). DOLPHIN, a cetaceous animal, form- ing the type of a family {Delphinidae) which includes also the porpoises and narwhal. Dolphins are cosmopolite ani- mals inhabiting every sea from the equa- tor to the poles; they are gregarious, and swim with extraordinary velocity. The common dolphin measures from 6 to 10 feet in length, has a long sharp snout with numerous nearly conical teeth in both jaws; its flesh is coarse, rank, and disagreeable, but is used by the Laplanders as food. It lives on fish, mollusca, etc. The animal has to come to the surface at short intervals to breathe. The blow-hole is of a semi- lunar form, with a kind of a valvular ap- paratus, and opens on the vertex, nearly over the eyes. The structure of the ear renders the sense of hearing very acute. One or two young are produced by the female, who suckles and watches them with great care. The name is also com- monly but improperly given to a fish, Coryphsena hippiiris, a member of the mackerel family, the beauty of whose colors when dying has been much cele- brated by poets. They abound within the tropics. DOLPHIN, BLACK, a species of Aphis, or plant-louse, which infests the bean, and often does considerable injury to crops, sucking the juices of the plants and preventing the development of flower-buds. It is of a dull black or dark- green color, the young spotted with sil- very white. DOMAIN, PUBLIC, in the United States, the vacant public land. The following gives an approximate estimate of the quantity of these lands, together with the area reserved and appropriated, in the several land districts at the close of the fiscal year ending June 30, 1920. Area In acres State Surveyed. Unsur- veyed. Total. Alabama. . . 37,200 6,643,509 276,595 15,237,248 7,364,231 120,077 5,628,945 4,346 14,240 73,523 256,297 33,360 18 3,964,156 66,844 31,457,972 14,915,870 81,044 7,404 13,259,365 259,073 13,316,198 784,571 5,154 18,017,735 37,200 18,268,909 276 595 Arizona. . . . Arkansas. . . 11,625,400 California. . Colorado. . . Florida. . . . Idaho Kansas. . . . 4,348,553 1,576,954 " 3, '176,167 19.585,801 8,941,185 120,077 8,805,112 4,346 14,240 75,523 256,297 33.360 18 Louisiana. . Michigan . . . Minnesota. . Mississippi . Missouri. . . Montana. . . Nebraska. . . Nevada. . . . N. Mexico. . N Dakota. . 2,009,585 22,8bV,263 3,533,008 5,973,741 66,844 54,267.175 18,448,878 81.044 7,404 14,000.757 288,472 29,991,715 1,086,686 5,154 Oklahoma. . Oregon S. Dakota. . . Utah Washington, 74V,392 29,399 16,675,517 302,115 Wyoming. . . 1,661,860 19,679,595 Grand total 131,824.975 68,495,153 200,320,128 DOMBOC (book of dooms or sen- tences) , the code of laws compelled by King Alfred, begins with extracts from the Bible. Then follov/ the Ten Com- mandments, the part of the Mosaic law relating to criminal offenses, and pas- sages from the New Testament, includ- ing the golden rule. The code was rati- fied by the Witan. Thorpe gives it in his "Diplomatarium Anglicanum aevi Saxonici" (English Diplomatarium of the Saxon Era) (1865). DOME, though often used synonymous- ly with cupola, a dome, in the stricter sense, signifies the external part of the spherical or polygonal roof, of which the cupola is the internal part. In Italian usage, however, it has a wider significa- tion, being used to denote the cathedral or chief church of a town, the house (domus) par excellence, or house of God. The cause of the name of the building being thus applied to the form of the roof which covered it arose from the fact that the chief churches of Italy were at one period almost universally so roofed. It
