Tag Archives | Chemistry

TERRA ALBA

of commerce is variously kaolin, gypsum, burnt alum, or magnesia, but the term should be reserved for kaolin.

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ALABASTER

A native form of finegrained gypsum or calcium sulphate CaSOJ, ued in sculpture and for ornamental applications.

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URANITE

Uranium minerals, one of which is a phosphate of uranium and copper, and the other a phosphate of uranium and calcium.

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PIPECLAY

A peculiar variety of clay found in Dorsetshire and Devonshire, used for making tobacco pipes and certain kinds of pottery.

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GINGERGRASS OIL

is distilled from the grass of a species of Andropogon, somewhat resembling geranium oil in character, and is used in perfumery.

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SARCINE or HYPOXANTHINE

A weak basic body occurring in muscular flesh and nearly related to xanthine. Both substances are chemically related to uric acid.

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MIMOSA BARK

The produce of the Acacia mimosa, containing an astringent principle used in tanning and resembling cutch in character and composition.

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OXALATES

Compounds of oxalic acid with metals and bases. The alkaline oxalates are soluble in water, but the others are for the most part insoluble.

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BRAZIL WOOD DYES

are red and orange, and are extracted from the wood of the Cesalpina crispa by boiling water. They are used for dyeing articles of silk and wool.

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AZURITE

A blue basic copper carbonate 2 found in the native state at Chessy, near Lyons, the United States of America, and elsewhere also known as chcssylite.

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