PATHOLOGY.--With the exception of those cases in which there is disease of the central nervous system or along the course of the nerves, we know nothing of the morbid anatomy of this affection. In fact, there is no appreciable alteration of the tissues or of the relations of parts; the spasm is to be considered as a symptom of disease, and not as the disease itself, or necessarily even as a sign of morbid structure in the organ. DIAGNOSIS.--In adults we can make the diagnosis certain by the aid of the laryngoscope. This can be done in a certain number of cases in childhood, it is true, but not with the same ease as in those who have reached more mature years. Ulcerations, benign and malignant growths, and foreign bodies may each or all produce spasm, but the existence of such causes is revealed by the mirror, and excludes such cases from the group under consideration. TREATMENT.--This does not differ in any essential respect from that suggested in spasm of the larynx in children. Attention to the condition which has been instrumental in the production of the affection, the use of antispasmodics, such as bromides, chloral, myrrh, musk, camphor, ether, chloroform, etc., will meet the urgent symptoms, while the use of tonics, such as vegetable bitters, quinine, iron, cod-liver oil, with attention to a proper hygiene, constitutes the general treatment. The question of tracheotomy in spasm of the larynx should be considered. It is sometimes stated that there is never in simple spasm a justification for this operation, and that the other means at our control are always adequate to meet the indication. Krishaber, Thaon, and others are of this opinion. Gougenheim and Schnitzler think it is sometimes required. While in a very large majority of cases of uncomplicated spasm of the larynx the spasm will yield to the measures recommended, it is nevertheless true that there are cases in which this result is not realized. The slowness of the action of some of the drugs, the difficulty in securing their introduction into the system, their absence at the time of the attack, and the delay in their administration,--all these facts may render it absolutely necessary to resort to an operation for the purpose of saving the life of the patient. It is, however, rare that this necessity will occur. In one case recently in my own practice I think a life was lost for want of the operation. The trouble was, as I thought, of hysterical origin, and at the time of the consultation did not threaten life. There was free movement of the vocal cords, and the vestibule of the larynx was not obstructed. Spasm of the constrictors occurred at night, and did not continue for a great length of time. There was certainly not paralysis of the abductors of the glottis. I directed an antispasmodic, and advised that if the spasm returned the next night a physician in the neighborhood should be sent for. The spasm did recur, and the physician