DERIVATION.--Made by evaporation and crystallization of a solution
obtained by passing steam issuing from rocks in volcanic regions of
Italy, through water; or by the action of hydrochloric or sulphuric
acids upon borax. Recovered by filtration and recrystallization.
PROPERTIES.--Transparent colorless scales, of a somewhat pearly luster,
six-sided tricline crystals, or a light white, very fine powder,
slightly unctuous to the touch; odorless, having a faintly bitterish
taste, and permanent in air. Soluble in water, alcohol, glycerine, etc.
DOSE.--Horses and cattle, 2 to 4 drs.; foals and calves, 20 to 30 grs.;
sheep and pigs, 30 to 40 grs.; dogs, 5 to 20 grs.