I. The smallest state of the Mexican republic, nearly enclosed by Zaca-tecas, and bounded S. by Jalisco; area, 2,946 sq. m.; pop. in 1868, 140,630. The eastern districts consist of elevated table lands, averaging 5,000 to 6,000 feet above the sea, and the western of broken mountain ranges, including the sierras of Laurel and Pinal, spurs of the Sierra Madre or Cordillera. The table lands produce abundant crops of cereals and a variety of fruits, of which olives, figs, grapes, and pears are the principal. There are a few unimportant silver and other mines within the state. It is divided into the four districts of Aguas Calientes; Rincon de Romos, Asientos, and Cal-villo.

II. The capital of the preceding state, situated upon a plain 6,000 feet above the sea, 270 N. W. of Mexico; pop. 22,534. It takes its name from two warm mineral springs in its neighborhood. The great road from Mexico to Durango and Sonora and that from San Luis Potosi to Guadalajara meet at Aguas Calientes. It is surrounded by rich gardens, abounding in olives, figs, vines, and pears, and contains churches, convents, and a hospital.