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Of, pertaining to, or designating, an unstable acid, H2S2O3, analogous to sulphuric acid, and formerly called hyposulphurous acid.

An element that in combination produces amphid salt; -- applied by Berzelius to oxygen, sulphur, selenium, and tellurium. [R.]

, produced by the deposit of an albuminous substance, giving a blue color with iodine and sulphuric acid; -- called also waxy or lardaceous degeneration.

A sugar of the composition C5H10O5, obtained from cherry gum by boiling it with dilute sulphuric acid.

etimes found native, but usually combined with silver, cobalt, nickel, iron, antimony, or sulphur. Orpiment and realgar are two of its sulphur compounds, the first of which is the true arsenticum of the ancients. The element and its compounds are active poisons. Specific gravity from 5.7 to 5.9. Atomic weight. Symbol A…

A mineral of a tin-white color and metallic luster, containing arsenic, sulphur, and iron; -- also called arsenical pyrites and mispickel.

om those acids whose names end -ic (excepting binary or halogen acids); as, sulphate from sulphuric acid, nitrate from nitric acid, etc. It is also used in the case of certain basic salts.

ich contains an atom of nitrogen and at least one other noncarbon atom (nitrogen, oxygen, sulphur). The prefixes furo-, thio, and pyrro-are used to distinguish three subclasses of azoles, which may be regarded as derived respectively from furfuran, thiophene, and pyrrol by replacement of the CH group by nitrogen; as, f…

An explosive consisting of sodium nitrate, charcoal, sulphur, and petroleum.

riginally brought from Bengal; Bengal stripes. Bengal light, a firework containing niter, sulphur, and antimony, and producing a sustained and vivid colored light, used in making signals and in pyrotechnics; -- called also blue light. -- Bengal stripes, a kind of cotton cloth woven with colored stripes. See Bengal, 3.…

A sulphide having two atoms of sulphur in the molecule; a disulphide, as in iron pyrites, FeS2; -- less frequently called bisulphuret.

A salt of sulphurous acid in which the base replaces but half the hydrogen of the acid; an acid sulphite.

to be bleached is effected either by the action of the air and light, of chlorine, or of sulphurous acid. Ure. Immortal liberty, whose look sublime Hath bleached the tyrant's cheek in every varying clime. Smollett.

cess of daubing a vessel's bottom near the surface of the water with a mixture of tallow, sulphur, and resin, as a temporary protection against worms, after the slime, shells, etc., have been scraped off.

A valuable ore of copper, containing copper, iron, and sulphur; -- also called purple copper ore (or erubescite), in allusion to the colors shown upon the slightly tarnished surface.

Lumps of pyrites or sulphuret of iron, the color of which is near to that of brass.

Sulphur; See Sulphur.

Containing or resembling brimstone; sulphurous. B. Jonson.

A zinc-carbon cell in which the zinc (amalgamated) is surrounded by dilute sulphuric acid, and the carbon by nitric acid or a chromic acid mixture, the two plates being separated by a porous cup.

s. -- Burning house (Metal.), the furnace in which tin ores are calcined, to sublime the sulphur and arsenic from the pyrites. Weale. -- Burning mirror, a concave mirror, or a combination of plane mirrors, used for the same purpose as a burning glass.