The author of this monograph has a gift for writing, so that he can make the commonplace unusual and any subject out of the ordinary of absorbing interest. His approach to any discussion is always the scholar's; his use of English is excellent, his way of thinking is logical and his conclusions are sharply pointed. For these reasons, if for no other, his publications are worth reading.
Many years ago he became curious about the basis for the well known anthropologic belief that women rarely produce children until several years after their onset of menstruation. Here he has assembled all the available information on this broad subject; it proves to include not only a considerable volume of experimental data but also a wealth of clinical observation.
His conclusions seem reasonable. He thinks that in the human species conception is possible at or even before the first estrus; when it occurs