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An 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).

A red ocher used to darken mahogany and for making chloride of potassium.

trontia, and magnesia, possessing some of the qualities of alkalies. -- Alkaline metals, potassium, sodium, cæsium, lithium, rubidium. -- Alkaline reaction, a reaction indicating alkalinity, as by the action on limits, turmeric, etc.

thyl phenyl ether, C6H5OCH3, got by distilling anisic acid or by the action of methide on potassium phenolate.

eldspar closely related to orthoclase, but triclinic. It is chiefly a silicate of sodium, potassium, and aluminium. Sp. gr., 2.57 -- 2.60.

drons with pearly luster on the cleavage surface. It is a hydrous silicate of calcium and potassium.

A combination of auric acid with a base; as, aurate or potassium.

A salt containing two parts of chromic acid to one of the other ingredients; as, potassium bichromate; -- called also dichromate.

To combine or treat with a bichromate, esp. with bichromate of potassium; as, bichromatized gelatine.

A compound of carbon and oxygen, as carbonyl, with some element or radical; as, potassium carboxide. Potassium carboxide, a grayish explosive crystalline compound, C6O6K, obtained by passing carbon monoxide over heated potassium.

A hydrous chloride of potassium and magnesium, sometimes found associated with deposits of rock salt.

A salt of chloric acid; as, chlorate of potassium.

A colored photographic picture taken upon paper made sensitive with potassium bichromate or some other salt of chromium.

and crystallizing like, common alum. It is regarded as a double sulphate of chromium and potassium. -- Chrome green (a) The green oxide of chromium, Cr2O3, used in enamel painting, and glass staining. (b) A pigment made by mixing chrome yellow with Prussian blue. -- Chrome red, a beautiful red pigment originally pre…

metal, fusible with difficulty. Its chief commercial importance is for its compounds, as potassium chromate, lead chromate, etc., which are brilliantly colored and are used dyeing and calico printing. Called also chrome.

t yellow (Chem.), a yellow crystalline powder, regarded as a double nitrite of cobalt and potassium.

, the process of making such prints. According to one method, the film is sensitized with potassium dichromate and exposed to light under a reversed negative. After the dichromate has been washed out, the film is soaked in glycerin and water. As this treatment causes swelling in those parts of the film which have been…

y acid taste, and is used very largely as an ingredient of baking powders; -- called also potassium bitartrate, acid potassium tartrate, etc.

p. the alimentary canal and glands connected with it. -- Digestive salt, the chloride of potassium.

A medicine with diuretic properties. Diuretic salt (Med.), potassium acetate; -- so called because of its diuretic properties.