When there is reason to believe that an individual possesses an inherent tendency to any disease, it is the duty of the medical adviser to study the constitution of the patient thoroughly, and after such study to recommend those measures of prevention best suited to avert the threatened disorder. Above all, let the physician look closely to the child at the period of life when any grave constitutional inheritable disease attacked the parent. This supervision should be carried into adult years, for there are instances on record of inherited diseases coming on at an advanced age, as in that of a grandfather, father, and son, who all became insane and committed suicide near their fiftieth year. Gout, apoplexy, insanity, chronic disease of the heart, epilepsy, consumption, asthma, and other diseases, are all more or less under the control of preventive measures. Some hereditary diseases, such as idiocy and cancer, we are impotent to prevent, in the present state of our knowledge. A singular fact in connection with the transmission of disease is the readiness with which a whole generation is passed over, the affection appearing in the next. A father or mother with consumption may in some instances have healthy children, but the grandchildren will die of the disease. Nature kindly favors one generation, but only at the expense of the next. Some diseases require, in addition to the general means of prevention to be found in a strict observance of the laws of health, some special measures in order to effectually ward off their appearance. But the extent of this work will not admit of their discussion. Already, indeed, have we unduly, perhaps, extended our remarks upon inheritance. The interest and importance of the facts must be our justification. WHY ARE WOMEN REDUNDANT? It cannot be without interest to look into the relative proportion of men and women now living. It will interest us still more to inquire into the reason why one sex preponderates over the other in numbers. This done, we will answer the question; Is the production of sex at all under the influence of the human will? The female sex is the more numerous in all thickly populated parts of the world where we have trustworthy statistics. In Austria, England, and Wales, there are nearly one hundred and five women for every one hundred men. In Sweden they are as one hundred and nine to one hundred. In all cities the disproportion is greater than in the country. In London there are one hundred and thirteen women to every one hundred men; and in the large towns of Sweden they stand as one hundred and sixteen to one hundred.