The anesthetist need not be at sea, although he is at a considerable distance from the face and eyes, which he is accustomed to watch with such care during narcosis. In any case, the _pupil_ is no longer a very useful guide because the patient has received morphine. There is access to the pulse at the wrist or the dorsal artery of the foot and its regularity and quality can be noted. A _diffuse_ and _weakening_ pulse wave is at once appreciated as a danger sign—too much chloroform—and the tube should be disconnected from the funnel to admit pure air, until the pulse has recovered its quality. [Sidenote: Color and Breathing] The color of the face can be observed; also the breathing movement of the chest and abdomen, and the respirations are readily heard through the tube. Any change in the character of the breathing or any hindrance in inspiration or expiration is readily detected. From time to time the funnel is disconnected and fluid which may have accumulated in the tube, as for instance condensed anesthetic, is allowed to flow out. [Sidenote: Clogging of the Tube] Secretions clogging the pharyngeal end of the tube are expelled by “milking” the tube, that is, forcing an occluded column of air through it by stroking it between the finger and thumb in a direction towards the patient, or allowing a gentle stream of oxygen to flow into its lumen. As long as the breathing remains unembarrassed and regular, the pulse is of good quality and a general, passive condition maintained, the patient is in the normal plane of surgical anesthesia and any interference would be meddling. CASES REQUIRING SUPERFICIAL ANESTHESIA. (1) Suprapubic prostatectomy and cystotomy after the skin incision is made. (2) Nephrectomy in general, but especially in tuberculous and enfeebled women. (3) Mastoid and brain operations. (4) Osteotomy and operations on the extremities. (5) Curettage and obstetrical manipulations. CASES REQUIRING ANESTHESIA OF MODERATE DEPTH. (1) Trachelorrhaphy, Colporrhaphy and perineorrhaphy. (2) Stretching of the sphincter and hemorrhoid operations. (3) Resection of the rectum by the perineal or sacral route. (4) Perineal prostatectomy. (5) Inguinal and femoral herniotomy. CASES REQUIRING PROFOUND ANESTHESIA. (1) Gynecological laparotomies: salpingo-oophorectomy and hysterectomy. (2) Operations on the stomach or gall-bladder: gastro-enterostomy, cholecystectomy. (3) Orthopedic manipulations necessitating complete muscular relaxation: reduction of congenital dislocation of the hip. CONCLUSION. Anesthesia is a science which deserves more attention.