The vitiated taste of an age not yet fully acquainted with the properties of correct literary composition caused the incorporation of verses into many of its most serious and dignified productions. These didactic poems seem singularly out of place in a medical treatise, and especially so where, as is usually the case, the poetry is, in both matter and harmony of numbers, below mediocrity. Apothecaries and chemists, of whom a competent knowledge of drugs was required, were subject to the corps of physicians who were forbidden to join in their enterprises or share their profits; they were sworn to obey the Code; the number of pharmacies was limited; and they were liable to the visitation of imperial inspectors responsible for the purity of their merchandise and the observance of the law. The precautions required in the sale of poisons; the directions for compounding electuaries and syrups; the most approved methods for the preparation of the love-potions believed to be so efficacious by mediæval credulity; the fabrication of charms for the prevention of disease, are all set forth in the Salernitan Code with minute and tedious exactness. In the city were many hospitals, the oldest of which was established in the ninth century, and was contemporaneous with similar institutions founded by the Ommeyade dynasty of Cordova. Some of them were richly endowed, others were entirely supported by charitable donations. The strict requirements of medical police were recognized in the isolation of patients suffering from contagious diseases. A systematic distinction was observed in the purposes of these beneficent foundations; they were of various classes and devoted to the care of the poor and the homeless, to the protection of invalid females of rank and fortune, to the support of foundlings; and the most intelligent treatment of every malady was gratuitously afforded. The members of monastic orders, for the most part, had charge of the hospitals, and acted in the capacity of nurses and attendants. The regulations of Frederick, who united the various schools of Salerno into one vast institution of medical learning, exacted the possession of the highest abilities, dexterity, and experience by the expectant practitioner. A preparatory course of three years in the general branches of literature and philosophy was required of him. Five years at least were to be devoted to study in the colleges, and one year was then to be passed under the eye of an experienced physician before the aspirant for professional distinction was pronounced competent to prescribe for the suffering.