Chippewa Indians, or Ojibways. A tribe of aborigines who inhabit portions of Michigan, Wisconsin, and the basin of Lake Superior. In the early settlement of the country they were allies of the French, and waged inveterate warfare against the Sioux. In 1855 they ceded their lands to the United States, and are now placed on reservations. See [Indians and their Agencies].

Chivalry (Fr. Chevalerie, from chevalier, “knight,” or “horseman”). The system of knighthood, together with the privileges, duties, and manners of knights. The qualifications or character of knights, as valor, dexterity in arms, courtesy, etc.

Chlorate of Potassa. Chlorate of potassa is formed by passing a current of chlorine, in excess, through lime-water, and then treating the mixture with the chloride of potassium or by the carbonate or sulphate of potassa. The chlorate of potassa and chloride of calcium are formed,—the former crystallizes, the latter remains in solution. It is soluble in water, but not sensibly so in alcohol. It is a more powerful oxidizing agent than nitre, and, when mixed with a combustible body, easily explodes by shock or friction. It is inflamed by simple contact with sulphuric acid, and thus affords a simple means of exploding mines.

Chlorates. Oxidizing agents used in [explosives] (which see). Chlorate of potassa is the salt ordinarily used.

Chocks. See Implements.

Choctaw Indians. A tribe of aborigines which formerly lived in Mississippi, along the Yazoo River. They are now settled in Indian Territory, and are partially civilized. See [Indians and their Agencies].

Choczim, or Chotyn. A fortified town of Bessarabia, Southern Russia, on the Dniester. Here the Turks were defeated by the Poles in 1621, and again in 1673; the Turks were again defeated at this place by the Russians in 1739.

Choke. The tied end of a cartridge; also the constriction of a rocket-case, etc.

Choker. An implement used by engineers to compress and test the circumference of a fascine. It consists of two strong pieces of wood about 4 feet long joined by a chain. Two rings inserted in the chain mark the length of the circumference required.

Chokey. An East Indian guard-house and prison.