Consumption has been called a house disease because it is in the house or rather in an enclosure of some kind that the disease is usually conveyed from one person to another. It is questionable whether tuberculosis can be contracted out of doors. The enclosure in which the disease is most frequently contracted is the home, because it is in the home where the greatest intimacy exists and where a consumptive spends most of his time. A house will harbor the contagion of tuberculosis a varying length of time accordingly as it is sanitary or unsanitary, light or dark, dry or damp. The tubercle bacillus does not live long in the bright light and fresh air but may live a very long time in a dark and dingy room. Damp, badly drained houses are particularly conducive to the development of tuberculosis. Next to the house the workshop undoubtedly is the place in which the disease is most frequently conveyed from the sick to the well. Working side by side, day in and day out, with a consumptive who expectorates carelessly in the shop is exceedingly dangerous. If the consumptive can be induced to properly care for his sputum there is no danger whatever. Stores and offices also are the means of spreading the disease. In such places the danger is greatest to those who are next to the consumptive and seldom extends much beyond this immediate environment. All this danger can be done away with by proper disposal of the broken down tissue.