Pharmacy covers a field of nearly as much importance, breadth and difficulty as that of medicine itself, and requires a special, extensive and thorough preparation. It should never be practiced by the physician, when the services of a competent manufacturing or dispensing pharmacist can be utilized. The physician should, however, be acquainted with the general principles and most details of the science and art of Pharmacy, that he may judge intelligently of the services rendered him by the pharmacist, and also be prepared to act with safety himself in cases of emergency. A pharmaceutical education to this extent, accompanied by dispensary practice, should be provided for in every thorough course of medical study. The more important terms pertaining to Pharmacy are defined and explained below.