Floods 1916 Florence destroying more than 100,000 persons. The devastation at Galveston, Tex., in 1900 was also caused by a storm wave of this origin. Reservoir floods through the bursting of dams are usually disastrous, notable cases being those that caused the loss of 2,500 lives at Johnstown, Pa., on June i, 1889, and of 76 lives at Austin, Pa., on Sept. 30, 1911. The most tremendous floods are produced by a river changing its course—as, for in- stance, the Yellow River in China. During historical times the place where this river discharges into the sea has varied through a distance of 350 m. The loss of life at each change has been enormous—amounting to between forty and fifty millions of lives from 1851 to 1866. The great flood of 1658 in the river Somme, in. France, was due to the combination of melting snow with heavy rainfall; and similar conditions prevailed in 1910, when the Seine flood overwhelmed Paris. The annual flood damage in the United States has been es- timated at more than $235,000,000. One of the most devastating floods in United States history began in January, 1937. Owing to abnormal winter rain in the valleys of the Ohio and Mississippi, the regions along these rivers were visited by unparalleled high water, which inundated Cincinnati, Louisville, and many smaller cities along the Ohio River. It threatened to destroy Cairo, 111., at the confluence of the Ohio and Mis- sissippi, but a floodway at New Madrid, Mo., was dynamited to relieve the pressure, and a 6o-foot concrete sea wall surmounted by a 3-foot bulkhead held firm as the crest of the flood moved down the Mississippi. The $270,000,000 levee and spillway system built since the 1927 floods was strengthened at weak spots by a large army of workmen as far as New Orleans. By February 15, 1937, the estimated num- ber of dead was 400; the property loss almost half a billion dollars; and the persons made homeless nearly 600,000. Quick aid was ren- dered by the Red Cross, which raised $20,- ooojooo for relief; the Federal Government, through the Disaster Loan Corporation, which was created as an emergency measure by act of Congress; the Coast Guard, the Resettlement Administration, and other gov- ernmental agencies. Flora, the ancient Roman goddess of flow- ers, whose festival was held annually in the spring from April 28 to May 3. In 238 B.C. a temple was erected to her in the Circus Maxi- raus in Rome. Flora, a term used to indicate the totality of plant species in a circumscribed area. It may also serve to indicate the totality of plant species at a given epoch in time. See BOTANY ; PLANTS. Florence (Italian Firenze), city, Italy, capital of the province of Florence. The city, originally on the right bank of the river, was extended to the left bank in the Middle Ages. Since the demolition of the ancient walls in 1865, it has spread extensively, especially to- ward the north and east, and since 1888 the former narrow and unsanitary quarters which constituted the heart of the city, and the site of the Ghetto, have been entirely modernized. The chief architectural feature is the Cathe- dral in the Piazza del Duomo, one of the larg- est churches in Italy, erected chiefly between 1296 and 1436. Its interior is adorned with several fine pieces of sculpture by Michelan- gelo, Ghiberti,.Sansovino, Delia Robbia, and others, and with two bronze doors. Its de- tached Campanile, Giotto's greatest work, was built between 1334 and 1387, and is 276 ft. high. Near the west end of the Cathedral stands the Baptistery, which served as the cathedral of the city down to 1128. It has still more famous bronze doors, three in number, the work of Ghiberti and Andrea Pisano. Among the other famous churches are those of Santa Croce (1294-1442), the Pantheon of Florence; Santa Maria Novella (1278-1350); Santa Maria del Carmine; San Lorenzo; the New Sacristy, built in 1523-9 by Michelangelo to serve as the mausoleum of the Medici, also belongs to this church; the Church of the An- nunciation (1250), decorated with frescoes by Andrea del Sarto; the Church of the Trinity, with frescoes by Ghirlandajo; of the Hol> Spirit (i5th century); of Or San Michele, with Orcagna's famous tabernacle; the Mon- astery of St. Mark, decorated with Fra Angelico's frescoes; and the fine Romanesque Church of San Miniato, outside the city. These edifices testify to the prominence of Florence in the world of art, a position which is still further enhanced by the glorious can- vases and sculptures of the Academy of Fine Arts; by the treasures of the Ufazi Palace (1560), one of the most valuable collections of painting and sculpture in the world; and the even more valuable collection of the Pitti Gallery (1440). Other notable buildings of the city are the castle-like Palazzo Vecchio (1298- 1314), the seat of the city's government until 1533, now the Town Hall; the cloistered haU of Dei Lanzi (1376), with Benvenuto Cellini's Per$eu$s ard other masterpieces of sculpture