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One of the elements, belonging to the alkaline earth group; a metal having a silver-white color, and melting at a very high temperature. It is difficult to obtain the pure metal, from the facility with which it becomes oxidized in the air. Atomic weight,

A dovecote or pigeon house.

A collection of dried specimens of plants, systematically arranged. Gray.

A syllabary.

A game in word making. See Logomachy, 2.

Of or pertaining to barium; as, baric oxide.

Native sulphate of barium, a mineral occurring in transparent, colorless, white to yellow crystals (generally tabular), also in granular form, and in compact massive forms resembling marble. It has a high specific gravity, and hence is often called heavy spar. It is a common mineral in metallic veins.…

An oxide of barium (or barytum); a heavy earth with a specific gravity above 4.

Barium sulphate, generally called heavy spar or barite. See Barite.

e or gray color, occurring massive or crystallized. It is a compound of the carbonates of barium and calcium.

The metal barium. See Barium. [R.]

pork, chopped fine and inclosed in a skin. -- Bologna stone (Min.), radiated barite, or barium sulphate, found in roundish masses composed of radiating fibers, first discovered near Bologna. It is phosphorescent when calcined. -- Bologna vial, a vial of unannealed glass which will fly into pieces when its surface is…

e flames of which are colored by various metallic salts, as those of antimony, strontium, barium, etc. -- Fire alarm (a) A signal given on the breaking out of a fire. (b) An apparatus for giving such an alarm. -- Fire annihilator, a machine, device, or preparation to be kept at hand for extinguishing fire by smotheri…

urns with a green flame. It consists of sulphur and potassium chlorate, with some salt of barium (usually the nitrate), to which the color of the flame is due. -- Green fly (Zoöl.), any green species of plant lice or aphids, esp. those that infest greenhouse plants. -- Green gage, (Bot.) See Greengage, in the Vocabul…

Native barium sulphate or barite, -- so called because of its high specific gravity as compared with other non-metallic minerals.

A collection of specimens of plants, dried and preserved; a hortus siccus; an herbarium. Steele.

ollection of specimens of plants, dried and preserved, and arranged systematically; an herbarium.

A species of the feldspar group containing barium. See Feldspar.

Hypophosphorous acid (Chem.) , an acid, H3PO2, whose salts are produced by the action of barium hygrate on phosphorus. It may be obtained from its water solution, by exaporation and freezing, as a white crystalline substance. It is a powerful reducing agent.

f crystalline form between substances of similar composition, as between the sulphates of barium (BaSO4) and strontium (SrSO4). It is sometimes extended to include similarity of form between substances of unlike composition, which is more properly called homoeomorphism.