"The ventilation by the great windows and ventilators in the ceiling was excellent; it was cheerfully lighted; and the arrangement of the gallery shielded the patients from dazzling light and from draughts from the windows and afforded an easy means of supervision, while the division by the roofless low partitions isolated the sick and obviated the depression that comes from sight of others in pain. "It was, moreover, in great contrast to the cheerless white wards of to-day. The vaulted ceiling was very beautiful; the woodwork was richly carved, and the great windows over the altars were filled with colored glass. Altogether it was one of the best examples of the best period of Gothic Architecture."[24] The fine hospital thus described was but one of many. Virchow, in his article on hospitals quoted in the same chapter, called attention to the fact that in the thirteenth and fourteenth centuries every town of five thousand or more inhabitants had its hospital, founded on the model of the great Santo Spirito Hospital in Rome, and all of them did good work. The surgeons of Guy de Chauliac's time would indeed find hospitals wherever they might be called in consultation, even in small towns. They were more numerous in proportion to population than our own and, as a rule, at least as well organized as ours were until the last few years. It is no wonder that with such a good hospital organization excellent surgery was accomplished. Hernia was Chauliac's specialty, and in it his surgical judgment is admirable. Mondeville before his time did not hesitate to say that many operations for hernia were done not for the benefit of the patient, but for the benefit of the surgeon,--a very striking anticipation of remarks that one sometimes hears even at the present time. Chauliac discussed operations for hernia very conservatively. His rule was that a truss should be worn, and no operation attempted unless the patient's life was endangered by the hernia. It is to him that we owe the invention of a well-developed method of taxis, or manipulation of a hernia, to bring about its reduction, which was in use until the end of the nineteenth century. He suggested that trusses could not be made according to rule, but must be adapted to each individual case. He invented several forms of truss himself, and in general it may be said that his manipulative skill and his power to apply his mechanical principles to his work are the most characteristic of his qualities. This is particularly noteworthy in his chapters on fractures and dislocations, in which he suggests various methods of reduction and realizes very practically the mechanical difficulties that were to be encountered in the correction of the deformities due to these pathological conditions. In a word, we have a picture of the skilled surgeon of the modern time in this treatise of a fourteenth-century teacher of surgery.