It is deeply regrettable that exposure to infection by tuberculosis is still an optional matter, and that the necessary curtailment of individual liberty has not yet been made in regard to all opportunities for it. In the case of impure milk, for instance, the law at least makes an effort to curb the preference which any individual may entertain for it. =Boarding and Lodging Houses.= There are other home occupations in which the menace is of a personal nature, and does not come through contaminated articles. Many patients take in boarders—an occupation which frequently entails considerable overcrowding of the home. This brings healthy individuals directly within the danger zone, and subjects them to the same risks incurred by the family itself. Other patients take in lodgers; here the risk is less, because meals are not included. In either case, there is great personal exposure, with equally great opportunities of infection. =Summary.= To sum up: Among 3107 patients under supervision, we find 608, or 19 per cent., carrying on some sort of gainful industry within the confines of their own homes. The resultant danger is of two kinds: from personal contact with the patient, and the remoter possibility of infection through articles which he makes or handles. The most serious risk is that incurred in boarding- and lodging-houses, where the inmates are subjected to a high degree of personal exposure. In other occupations there may be some personal risk, but it is slight and transitory, and therefore insignificant. In considering contaminated articles, we find there also two classes: those dangerous to a high degree, and those but slightly so, if indeed they may be called dangerous at all. Among the former, the most harmful are the contaminated foodstuffs, in which the risk is almost as great as through personal contact. Next comes laundry work, where the risk is in the repetition of infection, as in the use of household linen. Then comes the output of clothing, cotton and woollen, where also the risk is slight. In the case of other articles handled by the consumptive the risk involved is so insignificant as not to be worth mentioning. The following table shows the nature of these various Home Occupations, ranged in order of their risk to the community: Personal: Boarders 104 Lodgers 18 122 ——— Food: Bakeries 4 Confectioneries 4 Cook shops 6 Groceries 73 Oyster-parlours 1 Saloons 13 101 ——— Clothing: Laundry work 222