A ripe, fertilizable ovum in the ovary of a woman whose urine habitually contains sugar has a tendency, when the proper conditions are supplied, to develop into a female. In consequence, it is in such cases from the outset possible, without exercising any influence over the mother, without adopting any diet, to anticipate after a conception, the birth of a female individual. But if these conditions do not exist, if no sugar can be detected in the urine, the use of the same influence in order to obtain a male individual is still not superfluous. In this case also there is a need of an alteration of diet, although the individual in question accomplishes the process of physiological combustion in a manner which must be called the most favorable possible, seeing that with a mixed diet all the oxidizable materials are completely used up. Supposing that a mother of this sort wished for female offspring, one would not be in a position to give any advice. In this case one cannot, according to the facts which have been mentioned above, exercise any influence over an alteration in the course of the development of the ovum which would occasion the birth of a female. Such a mother is, up to the present time, beyond the reach of an influence that can affect the development of the future sex. * * * * * Two other cases follow in which male children were desired, several females having so far been the offspring of the marriage. The corresponding arrangements for the regulation of the diet, which led to the complete disappearance of sugar from the urine, showed themselves effective in the ripening of the ovum, and, after conception had taken place, in both cases a male individual was formed and developed. In addition to this, four other cases were under observation, in which no influence was exercised on sugar occurring in the urine in quantities, such as correspond to a normal healthy state. Without any kind of influence of diet, three females were born. In a fourth case I had a negative result. In three cases the result was positive. In the last three cases I was able to examine the urine as often as I wished, whilst in one case I was allowed to do so only at long intervals as a favor. * * * * * Let us now in conclusion endeavor to make some short reflections on the results which we are able to attain. First of all one would say that in certain regions and among certain peoples, where meat forms the principal diet, only male, or principally male, offspring would be anticipated.