Ringgold, a S. county of Iowa, bordering on Missouri, and intersected by Platte river and by the E. and W. forks of Grand river; area, 576 sq. m.; pop. in 1870, 5,691. The surface is undulating and the soil fertile. The chief productions in 1870 were 40,381 bushels of wheat, 340,735 of Indian corn, 79,159 of oats, 27,894 of potatoes, 52,856 lbs. of wool, 163,485 of butter, and 14,325 tons of hay. There were 2,612 horses, 2,306 milch cows, 4,112 other cattle, 14,219 sheep, and 8,764 swine. Capital, Mount Ayr.


See Epiphytes, vol. vi., p. 689.

Rio Arriba

Rio Arriba, a N. W. county of New Mexico, bordering on Arizona, and intersected in the southeast by the Rio Grande; area, about 5,500 sq. m.; pop. in 1870, 9,294. The E. part is watered by tributaries of the Rio Grande, the W. part by affluents of the San Juan, and it is crossed by several mountain chains. The chief productions in 1870 were 5,249 bushels of wheat, 10,351 of Indian corn, and 19,663 lbs. of wool. There were 399 horses, 749 mules and asses, 547 milch cows, 1,532 working oxen, 1,573 other cattle, 40,772 sheep, and 256 swine. Capital, Los Luceros.

Rio Branco

Rio Branco, a river of N. Brazil, rises from various sources in the Pacaraima mountains on the confines of Venezuela and British Guiana. After a S. course of about 400 m., in which it receives numerous affluents, it falls into the Eio Negro, in lat. 1° 25' S., Ion. 62° 10' W.

Rio Bravo Del Norte

See Rio Grande Del Norte.

Rio De La Plata

See Plata, Rio de la.

Rio De La Plata #1

See Plata, Rio de la.

Rio Grande

Rio Grande, a S. W. county of Colorado, formed since the census of 1870, intersected by the Rio Grande; area, 1,200 sq. m. The surface is mountainous, the San Juan being the principal range. There are valuable gold mines. Capital, Del Norte.

Rio Grande Do Sul

See SÃo Pedro Do Sul.

Rio Grande, Or Guapey

Rio Grande, Or Guapey, a river of Bolivia, which rises in the S. declivity of the mountains near Cochabamba, and flows in a S. E. direction through the plains of the province to lon. 62° W. Here it bends abruptly N., and after a semicircular sweep round the eastern base of the Sucre mountain chain, holds a N. W. course to its junction with the Mamoré, S. of Trinidad, about lat. 15° S. Exclusive of its numerous sinuosities, it has a total length of about 700 m., the lower half being easily navigable by small steamers. Almost its entire course is through a densely wooded country. Among its affluents, most of which are from the west, is the Flores, a stream of considerable magnitude.

Rio Motagua

See Guatemala, vol. viii., p. 289.

Rio Pari

See Amazon.


Riom, a city of Auvergne, France, in the department of Puy-de-Dôme, near the left bank of the Ambène, 8 m. N. of Clermont-Ferrand; pop. in 1872, 10,770. It contains several handsome public edifices and the ruins of the ancient ducal palace. It has a college, an insane asylum, and a monument to Desaix, who was born near this town. The chief manufactures are linen, distilled spirits, and articles of wax. There is trade in grain, wine, hemp, leather, preserved fruits, and oil. In the 14th century Riom was the capital of the duchy of Auvergne.