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n the free state, but in an orange-yellow water solution, which is a strong reducing and bleaching agent. Called also hydrosulphurous acid.

A bleaching vat; a kier.

A large tub or vat in which goods are subjected to the action of hot lye or bleaching liquor; -- also called keeve.

See 2d Leach.

See Leach.

See Leachy.

g process for the purpose of separating soluble material from that which is insoluble; to leach, as ashes, for the purpose of extracting the alkaline substances.

g a soluble substance form one that is insoluble, by washing with some solvent, as water; leaching.

A strong caustic alkaline solution of potassium salts, obtained by leaching wood ashes. It is much used in making soap, etc.

one of several species of small petrels, as the stormy petrel (Procellaria pelagica), and Leach's petrel (Oceanodroma leucorhoa), both of the Atlantic, and O. furcata of the North Pacific. -- Mother Carey's goose (Zoöl.), the giant fulmar of the Pacific. See Fulmar. -- Mother's mark (Med.), a congenital mark upon the…

rong acid taste, and is poisonous in large doses. It is used in dyeing, calico printing, bleaching flax and straw, the preparation of formic acid, and in salts of lemon for removing ink stains, mold, etc.

Chlorine used in bleaching. [Manufacturing name]

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

potches. Potcher engine (Paper Making), a machine in which washed rags are stirred in a bleaching solution.

to intensify (a developed image), as by bleaching with mercuric chloride and subsequently subjecting anew to a developing agent. -- Re`de*vel"op*er (#), n. --Re`de*vel"op*ment (#), n.

e; niter, a white crystalline substance, KNO3, having a cooling saline taste, obtained by leaching from certain soils in which it is produced by the process of nitrification (see Nitrification, 2). It is a strong oxidizer, is the chief constituent of gunpowder, and is also used as an antiseptic in curing meat, and in m…

Bleached yarn in making the linen tape called inkle; unwrought inkle. Knight.

sulphur. It is employed chiefly in the production of sulphuric acid, and as a reagent in bleaching; -- called also sulphurous anhydride, and formerly sulphurous acid. -- Sulphur ether (Chem.), a sulphide of hydrocarbon radicals, formed like the ordinary ethers, which are oxides, but with sulphur in the place of oxygen…

with, or exposing to the action of, sulphur; especially, an apparatus for fumigating or bleaching by means of the fumes of burning sulphur.

heir salts, and is used in the manufacture of hydrochloric and nitric acids, of soda, of bleaching powders, etc. It is also powerful dehydrating agent, having a strong affinity for water, and eating and corroding paper, wood, clothing, etc. It is thus used in the manufacture of ether, of imitation parchment, and of nit…