118 REPORT OF THE LEPROSY COMMISSION: material prosperity into three classes, viz., rich, moderately prosperous and poor. A classification of this nature no doubt involves great difficulties and cannot be altogether without inaccuracies. It has, however, been prepared as carefully as possible after due consultation with British officials and educated natives most versed in this matter. No European, and perhaps even no Indian, possesses a perfect knowledge of the caste systems, and hence the following remarks must be accepted as suggestions merely. From the following statistics it appears that the least amount of leprosy is found among the wealthy or rich castes, the ratio being less than one per ten thousand, while the disease is most prevalent among the poorer castes (3.05 per ten thousand) This suggests the fact that leprosy like tuberculosis has a certain predilection for people living under bad and more or less miserable conditions. It is greatly to be regretted that on account of the unavoidable want of statistical data at the time of writing, statements regarding other parts of India were unobtainable, because the evidence afforded by one province can hardly be considered sufficient, when a question of so difficult a nature is under discussion. In future, however, the degree to which the richer and poorer castes respectively are liable to suffer from leprosy should demand attention. It has already been shown that the poverty-stricken districts present higher ratios than the wealthier ones, and if the distribution of leprosy among the different castes should also establish this connexion between the disease and bad social or hygienic conditions, the importance of an individual predisposition is placed beyond a doubt. The further investigation of this matter must, however, be left to others who are more familiar with Indian social matters and who are in possession of all the statistical evidence obtainable The few facts at the disposal of the Commission clearly point to the influence of poverty and its accompaniments or consequences on the distribution of leprosy.