Three cases were due largely to home environment alone. In these cases there has been immorality between different members of the family. Five cases were due to the environment in the community alone,--with an apparently good home environment a single bad companion or group of companions had definitely influenced them to lead immoral lives. The factors in two cases were unresolved. Twenty-one cases appear to be due to the environment in the home and in the community, and were apparently normal types. The last group of 31 cases, however, represents but 15 per cent. of the 205 cases studied. Considering that those cases which show poor mental ability are perhaps not able to cope fairly with their environment on account of their slight mental defect, we find 85 per cent. of the cases studied showing some underlying defective mental or physical factor. We do not believe that this represents to any extent the cause of prostitution, for there are doubtless large numbers of individuals in the community with the same mental and physical defects who are not leading such a life. Still we feel that this class of women, if not sufficiently protected, represents the ones who are first (on account of their weakened resistance) to offer themselves to fill the demand. It may be interesting to note, in this connection, that although all of these cases have been studied from a social standpoint, and their own reasons for going into such a life have always been inquired into, in only two cases have we been able to find any definite relation between the economic conditions and the choice of this means of livelihood. _The Physical Aspect._ As complete a clinical history as possible has been obtained from each woman, and has been supplemented in as many cases as possible by laboratory tests to determine the extent of venereal disease. If the clinical history or the laboratory findings have given evidence of venereal disease, the individual has been considered to have the disease without the verification by both methods. As has been stated before, those cases in which there was no evidence of disease, but in which it was impossible to make a complete physical examination, have been discarded. As a result of these examinations we have found only one case, which after complete examination, did not show the presence of either disease. Thus over 99-1/2 per cent. of the cases show the presence of one of the two venereal diseases--134 cases or 55.8 per cent. gave no evidence of having had both. Of 238 cases which were examined for syphilis, 156 or 65.5 per cent. gave evidence of having had the disease. The results of the examinations for syphilis are as follows: