(From Basilicus Pulvis 1384 royal, a king). The royal powder.

This term has been applied to various purging powders, which contain cream of tartar as one of the ingredients. The term was afterwards changed to pulvis laxans, and it was then cream of tartar with an equal part of senna. A small proportion of scammony is now added,and the appellation is the pulvis e senna compo-situs. It is an useful and convenient purgative, though with senna alone not sufficiently active. The following simple purgatives are observed to be both more agreeable and more useful.

" Basilicus Pulvis 1385 . Calomel, pp. 3 ij. pulv. rhab. ss. jalap. 3 x.m. "Or, Antimonii tartarisati, gr. iv. calom. 3i. gr. iv. jalap. 3 ss. gr. viij. m.

"This is a convenient purge for gouty and rhcuma-"tic people, for whom it is best made into pills, and "to be taken at bed lime. It is also one of the best "purges for gross bodied children, who are subject to "breed worms and have large bellies; for though the "ingredients are efficacious, its operation will be mild "and safe enough. It clears the bowels of slime, and "discharges those humours that obstruct the mesen-"teric glands, and in a great measure the lacteals them-"selves, which is often the case in children; and is "attended with a hard belly, a stinking breath, fre-"quent fevers, and a decay of strength in the lower "parts. Those slight intermittents, which such chil-"dren are subject to, will much sooner be cured by such "a purge than by the bark; for these purges reach, "and carry off the cause, but the bark pens it up; and "by curing one, while such restriction continues, gives "room for a return with much greater aggravation. The "dose for children is from ten grains to fifteen; for adults "from fifteen grains to two scruples." Motherby.