Aëtius' work that is preserved for us is known in medical literature as his sixteen books on medical practice. In most of the manuscript it is divided into four Tetrabibloi, or four book parts, each of which consists of four sections called Logoi in Greek, Sermones in Latin. This work embraces all the departments of medicine, and has a considerable portion devoted to surgery, but most of the important operations and the chapters on fractures and dislocations are lacking. Aëtius himself announces that he had prepared a special work on surgery, but this is lost. Doubtless the important chapters that we have noted as lacking in his work would be found in this. He is much richer in pathology than most of the older writers, at least of the Christian era; for instance, Gurlt says that he treats this feature of the subject much more extensively even than Paulus Æginetus, but most of his work is devoted to therapeutics.
At times those who read these old books from certain modern standpoints are surprised to find such noteworthy differences between writers on medicine, who are separated sometimes only by a generation, and sometimes by not more than a century, in what regards the comparative amount of space given to pathology, etiology, and therapeutics. Just exactly the same differences exist in our own day, however. We all know that for those who want pathology and etiology the work of one of our great teachers is to be consulted, while for therapeutics it is better to go to someone else. When we find such differences among the men of the olden time we are not so apt to look at them with sympathetic discrimination, as we do with regard to our contemporaries. We may even set them down to ignorance rather than specialization of interest. These differences depend on the attitude of mind of the physician, and are largely the result of his own personal equation. They do not reflect in any way either on his judgment or on the special knowledge of his time, but are the index of his special receptivity and teaching habit.
Aëtius' first and second books are taken up entirely with drugs. The first book contains a list of drugs arranged according to the Greek alphabet. In the third book other remedial measures, dietetic, manipulative, and even operative, are suggested. In these are included venesection, the opening of an artery, cupping, leeches, and the like. The fourth and fifth books take up hygiene, special dietetics, and general pathology. In the sixth book what the Germans call special pathology and therapy begins with the diseases of the head. The first chapter treats of hydrocephalus. In this same book rabies is treated. What Aëtius has consists mainly of quotations from previous authors, many of whom he had evidently read with great care.
Concerning those "bitten by a rabid dog or those who fear water," Gurlt has quoted the following expression, with regard to which most people will be quite ready to agree with him when he says that it contains a great deal of truth, usually thought to be of much later origin: "When, therefore, any one has been bitten by a rabid dog the treatment of the wound must be undertaken just as soon as possible, even though the bite should be small and only superficial. One thing is certain, that none of those who are not rightly treated escape the fatal effect. The first thing to do is to make the wound larger, the mouth of it being divided and dilated by the scalpel. Then every portion of it and the surrounding tissues must be firmly pressed upon with the definite purpose of causing a large efflux of blood from the part. Then the wound should be deeply cauterized, etc."
There are special chapters devoted to eye and ear diseases, and to various affections of the face. Under this the question of tattooing and its removal comes in. It is surprising how much Aëtius has with regard to such nasal affections as polyps and ulcers and bleedings from the nose. In this book, however, he treats only of their medicinal treatment. What he has to say about affections of the teeth is so interesting that it deserves a paragraph or two by itself.
He had much to say with regard to the nervous supply of the mucous membranes of the gums, tongue, and mouth, and taught that the teeth received nerves through the small hole existing at the end of every root. For children cutting teeth he advised the chewing of hard objects, and thought that the chewing of rather hard materials was good also for the teeth of adults. For fistulas leading to the roots of teeth he suggests various irritant treatments, and, if they do not succeed, recommends the removal of the teeth. He seems to have known much about affections of the gums and recognizes a benignant and malignant epulis. He thought that one form of epulis was due to inflammation of a chronic character, and suggests that if remedies do not succeed it should be removed. His work is of interest mainly as showing that even at this time, when the desire for information of this kind is usually supposed to have been in abeyance, physicians were gathering information about all sorts even of the minor ailments of mankind, gathering what had been written about them, commenting on it, adding their own observations, and in general trying to solve the problems as well as they could.
Aëtius seems to have had a pretty good idea of diphtheria. He speaks of it in connection with other throat manifestations under the heading of "crusty and pestilent ulcers of the tonsils." He divides the anginas generally into four kinds. The first consists of inflammation of the fauces with the classic symptoms, the second presents no inflammation of the mouth nor of the fauces, but is complicated by a sense of suffocation—apparently our croup. The third consists of external and internal inflammation of the mouth and throat, extending towards the chin. The fourth is an affection rather of the neck, due to an inflammation of the vertebræ—retropharyngeal abscess—that may be followed by luxation and is complicated by great difficulty of respiration. All of these have as a common symptom difficulty of swallowing. This is greater in one variety than in another at different times. In certain affections even "drinks when taken are returned through the nose."
Hypertrophy of the tonsils—Aëtius speaks of them as glands—is to be treated by various astringent remedies, but if these fail the structures should be excised. His description of the excision is rather clear and detailed. The patient should be put in a good full light, and the mouth should be held open and each gland pulled forward by a hook and excised. The operator should be careful, however, only to excise those portions that are beyond the natural size, for if any of the natural substance of the gland is cut into, or if the incision is made beyond the projecting portion of the tonsil, there is grave danger of serious hemorrhage. After excision a mixture of water and vinegar should be kept in the mouth for some time. This should be administered cold in order to prevent the flow of blood. After this very cold water should be taken.
In this same book, Chapter L, he treats of foreign bodies in the respiratory and upper digestive tracts. If there is anything in the larynx or the bronchial tubes the attempt must be made to secure its ejection by the production of coughing or sneezing. If the foreign body can be seen it should be grasped with a pincers and removed. If it is in the esophagus, Aëtius suggests that the patient should be made to swallow a sponge dipped in grease, or a piece of fat meat, to either of which a string has been attached, in order that the foreign body may be caught and drawn out. If it seems preferable to carry the body on into the stomach, the swallowing of large mouthfuls of fresh bread or other such material is recommended.
With regard to goitre, Aëtius has some interesting details. He says that "all tumors occurring in the throat region are called bronchoceles, for every tumor among the ancients was called a cele, and, though the name is common to them, they differ very much from one another." Some of them are fatty, some of them are pultaceous, some of