The science of eugenics should not look for the realisation of a uniform type of man, but vary its aims and methods according to the natural differentiation of races and nations, taking account of ethnic psychology equally with ethnic somatology. The humanity of the future will be physically and mentally superior to the existing humanity, but the _amelioration of the species_ ought not to aim at the equality of races and populations. These races and populations ought not to lose their acquisition of particular adaptations to different conditions of existence. A science of universal or common eugenics should allow a eugenic ethnology to exist, which should indicate and facilitate for each race or nation the defence and propagation of its own _physical type_ and its own _mentality_. The most vigorous and dominant races will always be those which know how to create and preserve in sexual unions their characteristics of structure and culture. THE INHERITANCE OF EPILEPSY. (Abstract.) By David Fairchild Weeks, M.D., _Medical Superintendent and Executive Officer, the New Jersey State Village for Epileptics at Skillman, U.S.A._ In this paper the writer has endeavoured to learn what laws, if any, epilepsy follows in its return to successive generations, and the relation it bears to alcoholism, migraine, paralysis, and other symptoms of lack of neural strength. The data used in the study was analysed according to the Mendelian method which assumes that the inheritance of any character is not from the parents, grandparents, etc., but from the germ plasm out of which every fraternity and its parents and other relatives have arisen. If the soma possesses the trait of the recessive to normality sort, it lacks in its germ plasm the determiner upon which the normal development depends, and this condition is called nulliplex. If the soma possesses the trait of the dominant to normality sort, the determiner was derived from both parents and is double in the germ plasm, or normal, all of the germ cells have the determiner; or else it came from one parent only, is single in the germ plasm, or simplex, and half of the germ cells have and half lack the determiner. The method of obtaining the data was by means of field workers, who interviewed in their homes the parents, relatives and all others interested in the epileptic patient. These visits have established a friendly feeling toward and an intelligent understanding of the Institution and its work. The study is based on the data derived from 397 histories, covering 440 matings. The matings are classified under the six possible types, of nulliplex × nulliplex, nulliplex × simplex, nulliplex × normal, simplex × simplex, simplex × normal, and normal × normal.