_Education._ (Originally published in 1861. New edition, with the author's latest corrections, 1906.) By Herbert Spencer. This is the classic which marks an epoch in the personal development of every one who reads it, and which made an epoch in the history of education: the book was probably of more service to woman, owing to its liberation of girlhood, than any other of its century. _The Study of Sociology._ (International Scientific Series. Originally published in 1873. Twentieth edition, 1903.) By Herbert Spencer. This is, of course, _the_ introduction to sociology, written for that purpose by a master, and in every respect a masterpiece. It contains many eugenic references and arguments. As far as the eugenic education of the adult is concerned, this is rightly the preliminary work. Besides _The Evolution of Sex_ and Mrs. Parson's book on _The Family_, there are many others relevant to the question of woman and eugenics, of which one or two may be noted here. _Sex and Society, Studies in the Social Psychology of Sex._ (1907.) By W. I. Thomas. This is a very readable and recent work, and for the general reader much the most suitable of any that I know. _Man and Woman._ (Contemporary Science Series.) By Havelock Ellis. A very clear and readable book. _Youth--its Education, Regimen and Hygiene._ (1907.) By Stanley Hall. This is a new and abbreviated version of Professor Stanley Hall's two well-known volumes on _Adolescence_, published in 1904. For the general reader this much smaller work is very suitable, and especial attention may be directed to Chapter XI., “The Education of Girls.” It would have been presumptuous and absurd to attempt, in the course of a merely introductory volume, to deal, by anything more than allusion to its existence, with the great question of human parenthood in relation to race. Most urgently this question, of course, concerns the negro problem in America. The student who has to trust entirely to second-hand knowledge had best be silent. Lest, however, the reader should imagine that the older doctrines of race can be accepted without reserve, he will do well to study very carefully the latter part of Dr. Archdall Reid's book, already referred to, and, with extreme caution, the following:-- _Race Prejudice._ (1906.) By Jean Finot. This book most of us must believe to be extreme, but it should be read: it bears on what may be called international eugenics, and the whole question of inter-racial marriage. * * * * * On matters of transmissible disease and racial poisons there is much literature. Only one or two books can be referred to here. _The Diseases of Society: The Vice and Crime Problem._ (1904.) By G. F. Lydston. This, of course, is not a pleasant book, and it is open to much criticism in many respects, but it is well worth reading, especially in association with Dr. Rentoul's work.