Gam says that while experimenting on intrathoracic and intra-abdominal pressures, the blood pressure was observed to fall during vomiting. A series of experiments were performed to determine the cause of this fall. In all experiments the blood pressure, the intrathoracic pressure and the movements of the abdominal wall were recorded. Vomiting was induced in some cases by means of apomorphin; in others by filling the stomach with hot salt solution, hot soap suds, copper sulphate solution, etc. In every case a high negative pressure was observed in the thorax during the act. The pressure would fluctuate rapidly from zero to twenty-five or thirty centimeters (water) of negative pressure. The blood pressure, however, always fell, sometimes to less than half its former level. The fall in blood pressure was found to be due to a vagus inhibition of the heart, for on cutting the vagi while the vomiting was taking place, and while the blood pressure was at its lowest, there was an immediate increase in heart rate and rise to above the normal in blood pressure. Furthermore, when the vomiting was induced after the vagi had been cut, there was a rise instead of a fall in blood pressure.—_The Journal of the Amer. Med. Asso._ HOME TREATMENT OF SCIATICA. Pœppelmann suggests the following method for the home treatment of sciatica. A pail of boiling water is placed in a tub large enough to permit an old chair to be set in it. A tablespoonful of ol. pini sylvestris is poured into the boiling water, the patient seated on the chair with his feet outside the tub, and two sheets pinned around his neck, so that they reach the floor on all sides, covering him completely but leaving the head free. In this steam bath the patient is allowed to remain for twenty minutes. He is then rubbed briskly with a cold wet cloth, dried and put to bed for an hour. If necessary, especially with elderly people, cold applications may be made to the head during the process of steaming. Internally, iodides are given, preferably iodine-vasogen, 7–8 drops three times daily. The bowels must be kept freely open. The baths are given every other day, and five to fifteen sittings are required for a cure. In the author’s hands a successful outcome has been practically uniform.—_Critic and Guide._ USE OF CAFFEINE IN DIGITALIS ARRHYTHMIAS.