6
PREFACE.
has emboldened him to think that their publication in a more comprehensive form, with added physiological details and clinical illustrations, might contribute something, however little, to the cause of sound education. Moreover, his own conviction, not only of the importance of the subject, but of the soundness of the conclusions he has reached, and of the necessity of bringing physiological facts and laws prominently to the notice of all who are interested in education, conspires with the interest excited by the theme of his lecture to justify him in presenting these pages to the public. The leisure of his last professional vacation has been devoted to their preparation. The original address, with the exception of a few verbal alterations, is incorporated into them.
Great plainness of speech will be observed throughout this essay. The nature of the subject it discusses, the general misapprehension both of the strong and weak points in the physiology of the woman question, and the ignorance displayed by many, of what the co-education of the sexes really means, all forbid that ambiguity of language or euphemism of expression should be employed in the discussion. The subject is treated solely