IN his article on Colonial Geological Surveys in NATURE of March 4, Mr. V. A. Eyles gave a useful resume of recent discussions. There are, however, some further considerations to be noted. The figures he quoted from Sir Edmund Teale's paper of the results of mining operations, following upon the activities of Colonial Geological Surveys, do not include any statement of the amount and disposal of mining profits, or of the proportion of such profits set aside for the benefit of the local inhabitants as compensation for the loss of their national wealth. Thus arises the impression in some Colonial circles that Geological Surveys exist mainly for the benefit of outside mining interests—an erroneous impression, which leads to friction between Geological Surveys and other Government Departments, administrative, agricultural, educational, etc., more directly engaged in promoting the welfare of the local inhabitants. Some change in Colonial policy after the War seems, therefore, desirable.