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agonal crystals of a white, yellow, or grayish color and adamantine luster. It is a chlorocarbonate of lead.

A variety of calcite, or calcium carbonate, consisting of aggregated globular concretions about the size of a pea; -- called also peastone, peagrit.

ng the color of the Portland stone of England, made by calcining an artificial mixture of carbonate of lime and clay, or sometimes certain natural limestones or chalky clays. It contains a large proportion of clay, and hardens under water.

The impure potassium carbonate obtained by leaching wood ashes, either as a strong solution (lye), or as a white crystalline (pearlash).

n Alkali element, occurring abundantly but always combined, as in the chloride, sulphate, carbonate, or silicate, in the minerals sylvite, kainite, orthoclase, muscovite, etc. Atomic weight 39.0. Symbol K (Kalium).

o sodium sulphide by roasting with charcoal, and converting the sodium sulphide to sodium carbonate by roasting with lime. -- Mesne process. See under Mesne. -- Process milling, the process of high milling for grinding flour. See under Milling. -- Reversible process (Thermodynamics), any process consisting of a cycl…

A kind of thick paste or cement compounded of whiting, or soft carbonate of lime, and linseed oil, when applied beaten or kneaded to the consistence of dough, -- used in fastening glass in sashes, stopping crevices, and for similar purposes. Putty powder, an oxide of tin, or of tin and lead in various proportions, much…

Manganese carbonate, a rose-red mineral sometimes occuring crystallized, but generally massive with rhombohedral cleavage like calcite; -- called also dialogite.

Salt. Sal absinthii Etym: [NL.] (Old Chem.), an impure potassium carbonate obtained from the ashes of wormwood (Artemisia Absinthium). -- Sal acetosell\'91 Etym: [NL.] (Old Chem.), salt of sorrel. -- Sal alembroth. (Old Chem.) See Alembroth. -- Sal ammoniac (Chem.), ammonium chloride, NH4Cl, a white crystalline vola…

white crystalline substance having an alkaline taste and reaction, consisting of sodium bicarbonate (see under Sodium.) It is lagerly used in cooking, with sour milk (lactic acid) or cream of tartar as a substitute for yeast. It is also an ingridient of most baking powders, and is used in the preparation of effervescin…

utral salt. -- Alkaline salt (Chem.), a salt which gives an alkaline reaction, as sodium carbonate. -- Amphid salt (Old Chem.), a salt of the oxy type, formerly regarded as composed of two oxides, an acid and a basic oxide. [Obsolescent] -- Basic salt (Chem.) (a) A salt which contains more of the basic constituent th…

A kind of minium, or red lead, made by calcining carbonate of lead, but inferior to true minium. [Written also sandyx.] [Obs.]

ind of color prepared from calcined lapis lazuli; ultramarine; also, a blue prepared from carbonate of copper. [Written also sanders-blue.]

salts, consisting of two separate powders, one of which contains forty grains of sodium bicarbonate mixed with two drachms of RochellRochelle powders. -- Seidlitz water, a natural water from Seidlitz, containing magnesium, sodium, calcium, and potassium sulphates, with calcium carbonate and a little magnesium chloride…

prefixed are combined with two of some other element or radical; as, sesquibromide, sesquicarbonate, sesquichloride, sesquioxide.

A preparation of bicarbonate of soda, tartaric acid, sugar, etc., variously flavored, for making an effervescing drink; -- called also sherbet powder.

Carbonate of iron, an important ore of iron occuring generally in cleavable masses, but also in rhombohedral crystals. It is of a light yellowish brown color. Called also sparry iron, spathic iron.

consequence of the absorption of carton dioxide and water, by which it is converted into carbonate of lime and hydrate of lime.

An aromatic preparation of carbonate of ammonia and, often, some scent, to avoid or relieve faintness, headache, or the like.

Native zinc carbonate. It generally occurs in stalactitic, reniform, or botryoidal shapes, of a white to gray, green, or brown color. See Note under Calamine.