CRETA PRAEPARATA—PREPARED CHALK
Derivation.—Native calcium carbonate, freed from most of its impurities by elutriation.
Properties.—A white, amorphous powder, often molded into conical drops; odorless and tasteless; permanent in the air. Almost insoluble in water; insoluble in alcohol.
Dose.—Horses, 1 to 2 oz.; cattle, 2 to 4 oz.; sheep and pigs, 2 to 4 dr.; dogs, 10 gr. to 1 dr.