Biology of the Negro

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. It is difficult to say which of these two types of racial differ ences is the more important or which one may account for the differences in the effect of a given disease. One must determine first of all in each case if the disease behavior cannot be account ed for by the kind of houses people live in or the kind of work they do or the food they eat.