An essay for the regvlation of the practice of physick. Upon which regulation are grounded the composure of all differences between physicians and apothecaries: and reasons for preferring the long accustomed way of practising by prescription. To which is added a brief discourse concerning arcanas or nostrums, and another of the deportment of physicians towards the sick, and one another: as also of the apothecaries to the sick, to physicians, and to members of their own society. By a lover of truth and the good of mankind.