Celsus also had knowledge of dentistry, for he writes of teeth extraction by means of forceps, the fastening of loose teeth with gold wire, and a method of bursting decayed and hollow teeth by means of peppercorns forced into the cavity. He has described also many of the most difficult operations in obstetrics.

When it is remembered that Celsus lived centuries before the introduction of chloroform and ether, it is wonderful to contemplate what was accomplished long ago.

The qualities which should distinguish a surgeon were described by Celsus thus: "He should not be old, his hand should be firm and steady, and he should be able to use his left hand equally with his right; his sight should be clear, and his mind calm and courageous, so that he need not hurry during an operation and cut less than required, as if the screams of the patient made no impression upon him."

(2) Anatomy.—Celsus understood fairly well the situation of the internal organs, and knew well the anatomy of the chest and female pelvis. His knowledge of the skeleton was particularly complete and accurate. He describes very fully the bones of the head, including the perforated plate of the ethmoid bone, the sutures, the teeth, and the skeletal bones generally. Portal states that Celsus knew of the semicircular canals. He understood the structure of the joints, and points out that cartilage is part of their formation.

Celsus wrote: "It is both cruel and superfluous to dissect the bodies of the living, but to dissect those of the dead is necessary for learners, for they ought to know the position and order which dead bodies show better than a living and wounded man. But even the other things which can only be observed in the living, practice itself will show in the cures of the wounded, a little more slowly but somewhat more tenderly."

(3) Medicine.—His treatment of fevers was excellent, for he recognized that fever was an effort of Nature to throw off morbid materials. His recipes are not so complicated, but more sensible and effective than those of his immediate successors. He understood the use of enemas and artificial feeding. In cases of insanity he recognized that improvement followed the use of narcotics in the treatment of the accompanying insomnia. He recognized also morbid illusions. He recommended lotions and salves for the treatment of some eye diseases.

Although Celsus practised phlebotomy, he discountenanced very strongly its excessive use. The physicians in Rome, in his time, carried bleeding to great extremes. "It is not," wrote Celsus, "a new thing to let blood from the veins, but it is new that there is scarcely a malady in which blood is not drawn. Formerly they bled young men, and women who were not pregnant, but it had not been seen till our days that children, pregnant women, and old men were bled." The reason for bleeding the strong and plethoric was to afford outlet to an excessive supply of blood, and the weak and anæmic were similarly treated to get rid of evil humours, so that hardly any sick person could escape this drastic treatment.

Emetics were greatly used in the time of Celsus. Voluptuaries made use of them to excite an appetite for food, and they used them after eating heavy meals to prepare the stomach for a second bout of gluttony. Many gourmands took an emetic daily. Celsus said that emetics should not be used as a frequent practice if the attainment of old age was desired.

Celsus excelled as a compiler, and had the faculty of selecting the most admirable contributions to the art of healing from previous medical writers. His writings also give an account of what was best in the medical practice of Rome about his own time. He had a great love for learning, and it is remarkable that he was attracted to the study of medicine, for he was a patrician, and members of his class considered study of that kind beneath the dignity of their rank.

In the Augustan age, when literature in Rome reached its highest level, the literary style of Celsus was fit to be classed with that of the great writers of his time. He was never quoted as a great authority on medicine or surgery by later medical writers; and Pliny refers to him as a literary man, and not as a practising physician. From the fact that he elaborated no new system, and founded no new medical sect, it is not strange that he had no disciples.