The soles of the feet and the palms of the hands are extremely sensitive, having abundance of nerves, as we find if we tickle them. If the feet are put often into hot water, they will become habitually cold, and make one more or less delicate and nervous. On the other hand, by rubbing the feet often in cold water, they will become permanently warm. A cold foot-bath will stop a violent fit of hysterics. Cold feet show defective circulation. At half-past ten in the forenoon we were subjected to by far the most trying agent in the water system--the often-mentioned douche. No patient is allowed to have the douche till he has been acclimated by at least a fortnight's treatment. Our readers will understand that from this hour onward we are describing not our first Sudbrook day, but a representative day, such as our days were when we had got into the full play of the system. The douche consists of a stream of water, as thick as one's arm, falling from a height of twenty-four feet. A pipe, narrowing to the end, conducts the stream for the first six feet of its fall, and gives it a somewhat slanting direction. The water falls, we need hardly say, with a tremendous rush, and is beaten to foam on the open wooden floor. There were two douches at Sudbrook: one, of a somewhat milder nature, being intended for the lady patients. Every one is a little nervous at first taking this bath. One cannot be too warm before having it: we always took a rapid walk of half an hour, and came up to the ordeal glowing like a furnace. The faithful William was waiting our arrival, and ushered us into a little dressing-room, where we disrobed. William then pulled a cord, which let loose the formidable torrent, and we hastened to place ourselves under it. The course is to back gradually till it falls upon the shoulders, then to sway about till every part of the back and limbs has been played upon: but great care must be taken not to let the stream fall upon the head, where its force would probably be dangerous. The patient takes this bath at first for one-minute; the time is lengthened daily till it reaches four minutes, and there it stops. The sensation is that of a violent continuous force assailing one; we are persuaded that were a man blindfolded, and so deaf as not to hear the splash of the falling stream, he could not for his life tell what was the cause of the terrible shock he was enduring. It is not in the least like the result of water: indeed it is unlike any sensation we ever experienced elsewhere. At the end of our four minutes the current ceases; we enter the dressing-room, and are rubbed as after the plunge-bath. The reaction is instantaneous: the blood is at once called to the surface. 'Red as a rose were we:' we were more than warm; we were absolutely hot. Mr. Lane records some proofs of the force with which the douche falls:--