Hotels and boarding houses sometimes become the media of spreading tuberculosis, although perhaps not as often as people think. The occupancy of a room by a consumptive for a single night or for two or three nights would ordinarily not contaminate the room sufficiently to make it possible for a subsequent occupant to get the disease. Neither would the occupancy of a badly infected room for a single night by a healthy person likely convey the disease. It really takes some time to implant tuberculosis, and one would have to occupy a room of this kind for a good many days before he could get an implantation. Something depends upon the condition of one's health. If one is much depressed he will get an implantation much easier than when he is in perfect condition.