DOPPLERITE (named after Christian Doppler, the first to bring it to notice), an amorphous mineral occurring in elastic or partly jelly-like masses found in peat-beds in Styria and Switzerland, and regarded as a fossil peat. When fresh it is a brownish-black, with a dull brown streak and greasy subvitreous lustre, insoluble in alcohol or ether. Dopplerite is also the name of a related mineral, grayish, earthy and plastic in the fingers when fresh.
DOR, or BONGO (q.v.), the names given to a mixed tribe of negroes living in north central Africa, in the lowlands of the Bahr el-Ghazal, Anglo-Egyptian Sudan. The race is of medium size, attaining splendid muscular development. Their skin is red-brown; they live in well-built huts, their main employment is agriculture, and they have the reputation of being industrious and amenable. The women tattoo the upper part of the body, and as orna ments wear rings and straws through the lips and nostrils. They are noted for remarkable productions in iron (which is their currency) and wood work. Consult Schweinfurth, The Heart of Africa) (London 1873).
DOR, or DORR, a species of beetle, be longing to the family of earth-borers; the cock-chafer of Europe. It is of a glossy violet, black or deep greenish-black. The club of the antenna is yellowish, the elytra smooth, but slightly punctated, as is the thorax. It may often be seen flying about in the summer evenings. Its size and weight render it very unwieldy on the wing, so that it has but little power of guiding itself, and apparently none of checking its course quickly, for it strikes against all kinds of objects, but withput suffer ing any hurt. The female lays its eggs in patches of cow-dung. It is about an inch long. It is also called . dor- or dorr-beetle, dor-fly and buzzard-fly.
DOR, or MONT DORE, moil' doe (often written Mont d'Or), a chain of mountains in France belonging to the group of the Auvergne Mountains, in the department of Puy-de-Dome. They are of volcanic formation. The Puy-de Sancy, the highest peak of • central France, is 6,190 feet.