Stanni Pulvis, seu Limatura. Tin filings. It was formerly used as a vermifuge, but is now seldom prescribed, other much more effectual remedies having been discovered. It is usually used against Lumbrici or Round Worms. Its action is supposed by some to depend on the disengagement of Hydrogen when the metal is brought into contact with the gastric juice; by others it is believed to act as a mechanical irritant. Although it has fallen into disuse, Dr. Graves* observes that with some persons it is an unfailing remedy.

* Ess. Mat. Med. and Therap., p. 338.

Pereira, vol. ii. pt. ii. p. 722. Ranking's Abstract, xxx. p. 166.

Dose, from gr xx. to gr. lx., in Treacle, repeated three or four times a day for four successive days, followed by a brisk cathartic.