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every nart of the wall of the cavity. We leave that gauze in for six to eight days. It is then nasty; full of pus. We can pull it all out readily, as granulation tissue has just started. There isn't enough granulation tissue to cause any bleeding, but the walls of the cavity will fall together, and they will frequently heal without any further dressing. We put nothing else in.I have been much interested for the past year in the development of ventriculoscopy owing to the possibilities it offers not only in diagnosis, but operative procedures. The ventricle was cystoscoped once about a year ago, but the measure was rather unsatisfactory owing to the type of instrument used. Dandy1 has performed ventriculoscopy successfully, but feels that the indirect method of ventr.cular examination is so satisfactory that ventriculoscopy will be used only occasionally. In another communication-' he describes briefly the operative steps necessary to reach and open the floor of the third ventricle from below by means of a frontal apprcach. This operation must be one of considerable magnitude with a high mortality, but the principle of puncture of the third ventricle is sound. In a cursory examination of the literature I have been unable to find mention of puncture of the ventricular floor from within either by open operation or with the operating cystoscope. After considerable delay, due to the difficulty of obtaining the brain of a hydrocéphalie infant, such a specimen was obtained, hardened in situ and the ventricles explored with a direct vision operating urethroscope, and it was found that the third ventricle was easily accessible. A small sound passed through the urethroscope could then be gently pushed through the floor to the third ventricle and the opening thus made communicated directly with the interpeduncular cistern. This seemed a rational method of attempting to permit, in cases of noncommunicating hydrocephalus, the evacuation of cerebrospinal fluid into the subarachnoid space. abstract op case record.

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