THEIR SALTS.

65

crystallize ; collect, and squeeze the crystals ;dissolve them in a pint of distilled waterheated to 212° ; digest the Solution for fif-teen minutes with the Animal charcoal; Al-ter, and crystallize as hefore. Dry the crys-tals with a heat not exceeding 140°.

The mother liquors of each crystallizationwill yield a little more salt by concentrationand cooling.

Strychnia.

Take of Nux-vomica, one pound ;

Quicklime, one ounce and a-half;

Ilectified spirit, a sufficiency.Subject the Nux-vomica for two hours to thevapour of steam, chop or slice it, dry it tho-roughly in the vapour-bath, orhot air-press,and immediatcly grind it in a coffee-mill.Macerate it for twelve hours in two pints ofwater and boil it; strain through linen orcalico, and squeeze the residuum ; repeat themaceration and decoction twice with a pintand a half of water. Concentrate the decoc-tions to the consistence of thin syrup ; addthe Lime in the form of milk of lime ; drythe precipitate in the vapour-bath ; pulve-rize it, and boil it with successive portions ofIlectified spirit tili the spirit cease to acquirea bitter taste. Distil off the spirit tili theresiduum be sufficicntly concentrated to crys-f2