Baths. The most usual form of digesting substances in a gentle heat was in a Balneum Mariæ, Bain-Marie, or as old English writers translated it a St. Mary’s bath. It was supposed to have been derived from balneum maris, as if sea water was used; but there is no justification for this guess. Littré thinks it was called the bath of Mary because of its gentleness. Sand-baths, cinder-baths, horse-dung baths, and iron-filings baths were also ordered.
Bezoards. Mineral bezoard was diaphoretic antimony. Silician earth was also called mineral bezoar.
Blisters. Freind says these were introduced into medicine in Venice and Padua during the plague of 1576. Jerome Mercuriali wrote about them. They superseded dropaxes and metasyncretics.
Bolus was a medicine of the consistence of an electuary or rather stiffer, taken in pieces about the size of a bean. The Greek word meant a lump of earth, and it was used medically by the Romans. It was the same as katapotia.
Calx was the name applied to lime which had been burnt, and from this it came to be applied to the white powdery product yielded by burning metals. Thus came the calx Lunæ, the calx Saturni, the calx Jovis, the calx Mercurii, and others. The ancient theory was that in burning the metal the sulphur principle was driven out, and this was the parent of Stahl’s phlogiston theory.
Caput mortuum and terres damnées were names applied to residues in retorts after operations.
Carminative. A medicine which expels winds. One theory traces it to carmen, a charm, but most authorities consider that it was an application to medicine of the term carminare, to card wool, and suggested that the remedy acted by combing through the humours.
Cataplasm. From Greek kata-plassein, to apply over. Used originally for both poultices and plasters. Cataplasmata were perfumed powders sprinkled over the clothes, or sometimes depilatories.
Catholica. Electuaries which purged all the humours.
Cerates were ointments made solid by wax, but not so hard as plasters.