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A natural occurrence of a useful mineral under the conditions to invite exploitation. Raymond.

of determining the relations of an object, as regards genus and species; the referring of minerals, plants, or animals, to the species to which they belong; classification; as, I am indebted to a friend for the determination of most of these shells.

I. Taylor. Determinative tables (Nat. Hist.), tables presenting the specific character of minerals, plants, etc., to assist in determining the species to which a specimen belongs.

A miner's compass. Dial bird (Zoöl.), an Indian bird (Copsychus saularius), allied to the European robin. The name is also given to other related species. -- Dial lock, a lock provided with one or more plates having numbers or letters upon them. These plates must be adjusted in a certain determined way before the lock…

A wall-like mass of mineral matter, usually an intrusion of igneous rocks, filling up rents or fissures in the original strata.

A mineral of the scapolite group; -- so called from the double effect of fire upon it, in fusing it, and rendering it phosphorescent.

s, and determining the nature and quantity of metallic substances contained in any ore or mineral.

A mineral consisting of the carbonate of lime and magnesia in varying proportions. It occurs in distinct crystals, and in extensive beds as a compact limestone, often crystalline granular, either white or clouded. It includes much of the common white marble. Also called bitter spar.

A massive mineral of tin-white or steel-gray color, an arsenide of copper.

Very fine mineral matter held in suspension in water. Raymond.

Any animal, vegetable, or mineral substance used in the composition of medicines; any stuff used in dyeing or in chemical operations. Whence merchants bring Their spicy drugs. Milton.

od. (b) A quick, sharp blow. -- Dry bone (Min.), Smithsonite, or carbonate of zinc; -- a miner's term. -- Dry castor (Zoöl.) a kind of beaver; -- called also parchment beaver. -- Dry cupping. (Med.) See under Cupping. -- Dry dock. See under Dock. -- Dry fat. See Dry vat (below). -- Dry light, pure unobstructed li…

A mineral of a blackish green color, commonly massive or in nodules. It is a hydrous phosphate of iron.

Sweetened; mollified. Dulcified spirit or spirits, a compound of alcohol with mineral acids; as, dulcified spirits of niter.

beaten into thin sheets, used in Holland to ornament toys and paper; -- called also Dutch mineral, Dutch metal, brass foil, and bronze leaf. -- Dutch liquid (Chem.), a thin, colorless, volatile liquid, C2H4Cl2, of a sweetish taste and a pleasant ethereal odor, produced by the union of chlorine and ethylene or olefiant…

A mineral consisting of antimony and silver.

ne of the small galleries run out in front of the glacis. They serve to annoy the enemy's miners.

A grayish white zeolitic mineral, in tetragonal crystals. It is a hydrous silicate of alumina and baryta.

A mineral of a green color and pearly luster; a hydrous phosphate of copper.

A mineral resin, of a blackish brown color, occurring in soft, flexible masses; -- called also mineral caoutchouc, and elastic bitumen.