Introduced as a perfect antiseptic, it should have a good trial; a powerful aniline dye, destroying bacteria in living organisms, its name signifying "Pus-destroyer." It disinfects a septic wound.

"A mixture of several methyl-violets." - Liebreich.

Therapeutics. It is non-poisonous, without arsenic, inodorous, and heals suppurating wounds. Used of a blue colour for surgical and gynaecological, and of a yellow for ophthalmic cases. Also offered for use as a dusting powder, of 2% with talc, as a solution in water of l% strength, and in ointments of 1 and of 2 per cent, strengths, in pencils and surgical dressings (1°/00), gauze, wadding, and silk, both blue and yellow.

"Pyoktanin possesses great permeative power. Injected into the tissues, it diffuses itself at once. In rodent and indolent ulcers, the action of Pyoktanin is no less marvellous. Curette the ulcer and apply 1/2 per cent, alcoholic solution or ointment. Fibroma injected deeply and thoroughly with Pyoktanin will shrink and show signs of absorption." - Merck's Bulletin, June, 1891.

Anthrarobin is produced from Alizarin; it is a dark yellow powder, soluble in spirit. In skin diseases, ointment or tincture, 10 per cent, strength.

Apyonin, a substance of the methyl violet class, antiseptic; a yellow, crystalline powder, slightly soluble in water, soluble in alcohol; made by Petit, of Paris.

Methylene Blue. An aniline dye, for neuralgia; dose, 5 grains.