He was proclaimed emperor and assumed the reign title of Chia-ch'ing in 1796, after the abdication of his father, the Ch'ien-lung emperor (reigned 1735–96). Power, however, remained in the hands of
Any member of a series of silicate minerals that consist of calcium silicates of aluminum and magnesium; gehlenite is the aluminous end-member and åkermanite the magnesian end-member. These minerals crystallize from calcium-rich, alkaline magmas and from many artificial melts and blast-furnace slags. They occur in thermally metamorphosed limestones at contact
Compound with a structure in which silicate tetrahedrons (a central silicon atom surrounded by four oxygen atoms at the corners of a tetrahedron) are arranged in rings. Each tetrahedron shares two of its oxygen atoms with other tetrahedrons; the rings formed may have three (e.g., benitoite), four (e.g., axinite), or six members (e.g., beryl). The cyclosilicates have chemical formulas
Capital of Vichada departamento, eastern Colombia, situated at the junction of the Meta and Orinoco rivers, across from Puerto Páez, Venezuela. The easternmost of Colombia's urban centres and a potentially important port on the Orinoco River, the city is a collection centre for the cattle and livestock products, corn (maize), gums, and resins that are produced in the
Goatfishes are characterized by two well-separated dorsal fins and by a pair of long, sensory chin barbels. The barbels are used to find the small, bottom-living invertebrates on which the fishes feed; when not in use, the barbels are flattened into a groove on the throat. Inhabitants
Temperatures generally decrease from south to north. The mean annual temperature is above 68 °F (20 °C) in the Pearl River Valley. It decreases to between 59 and 68 °F (15 and 20 °C) in the middle and lower reaches of the Yangtze, to about 50 °F (10 °C) in North China and the southern part of Sinkiang, and to 41 °F (5 °C) in the southern area of the Northeast, the northern part of Sinkiang, and places near the Great Wall.
Any rock produced by dynamic metamorphism during which faulting, granulation, and flowage may occur in previously crystalline parent rocks. When stress exceeds breaking strength, a rock yields by rupture. The rock may break as a unit, or individual minerals may be selectively granulated. The stress is generally not the same in all directions, so that movement in
