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A rare element of the chromium group, occurring in nature in the minerals molybdenite and wulfenite, and when reduced obtained as a hard, silver-white, difficulty fusible metal. Symbol Mo. Atomic weight 95.9.

A mineral occurring usually in small isolated crystals, -- phosphate of the cerium metals.

growing in the mountains of Europe (Rosa alpina). -- Mountain soap (Min.), a soft earthy mineral, of a brownish color, used in crayon painting; saxonite. -- Mountain sorrel (Bot.), a low perennial plant (Oxyria digyna with rounded kidney-form leaves, and small greenish flowers, found in the White Mountains of New Ham…

Iron pyrites, or arsenical pyrites; -- so called by the Cornish miners.

A mineral of blackish lead-gray color and metallic luster, generally of a foliated massive structure; foliated tellurium. It is a telluride of lead and gold.

iquid, inflammable hydrocarbons, occurring naturally, and usually called crude petroleum, mineral oil, or rock oil. Specifically: That portion of the distillate obtained in the refinement of petroleum which is intermediate between the lighter gasoline and the heavier benzine, and has a specific gravity of about 0.7, --…

y or description of nature as a whole, incuding the sciences of botany, zoölogy, geology, mineralogy, paleontology, chemistry, and physics. In recent usage the term is often restricted to the sciences of botany and zoölogy collectively, and sometimes to the science of zoology alone. -- Natural law, that instinctive se…

ulatory system, at Bad Nauheim, Germany, by G. Schott, consisting in baths in the natural mineral waters of that place, which are charged with carbonic acid, and the use of a graduated course of rest, physical exercises, massage, etc.; hence, any similar treatment using waters artificially charged with the essential in…

Fetid feldspar, a mineral which, when struck, exhales a fetid odor.

A mineral occuring at Vesuvius, in glassy agonal crystals; also elsewhere, in grayish or greenish masses having a greasy luster, as the variety elæolite. It is a silicate of aluminia, soda, and potash.

A hard compact mineral, of a dark green color, formerly worn as a remedy for diseases of the kidneys, whence its name; kidney stone; a kind of jade. See Jade.

element, of doubtful genuineness and uncertain indentification, said to exist in certain minerals, as columbite. Hermann.

An aggregated mass of any ore or mineral, in an isolated state, within a rock.

A mineral of a copper-red color and metallic luster; an arsenide of nickel; -- called also coppernickel, kupfernickel.

malleable, and ductile. It occurs combined with sulphur in millerite, with arsenic in the mineral niccolite, and with arsenic and sulphur in nickel glance. Symbol Ni. Atomic weight 58.6.

A mineral occurring in transparent crystals, usually of a white, sometimes of a reddish gray, or lemon-yellow, color; native sodium nitrate. It is used in making nitric acid and for manure. Called also soda niter.

A greenish yellow or green mineral, consisting chiefly of the hydrous silicate of iron.

le with water; as, olive oil, whale oil, rock oil, etc. They are of animal, vegetable, or mineral origin and of varied composition, and they are variously used for food, for solvents, for anointing, lubrication, illumination, etc. By extension, any substance of an oily consistency; as, oil of vitriol.…

A massive and fibrous mineral of a whitish color, chiefly hydrous silicate of lime.

An olive-green mineral, a hydrous arseniate of copper; olive ore.