lliam T. Belfield,
Bush Medical College, University of Chicago.=

"The book seems to me calculated to be very useful, and should
be in the hands of a large number of college
undergraduates."--=Dr. Isaac Sharpless, President Haverford
College.=

"I have read the book and had other priests read it and all
concur in my opinion that it is destined to become a powerful
auxiliary to our young men in their struggle for a purer life.
The language is not vague, but to the point, and every young man
will understand it."--=Rev. A.M. Kirsch, University of Notre
Dame.=

"I have the strongest praise for the book as a whole--the
biological foundation, directness, freedom from cant and prudery
and the practical way in which the author gets to the level of
his readers."--=Dr. C. Judson Herrick, Denison University,
Ohio.=

"I have read Dr. Hall's book with the keenest curiosity and
interest. Why could not such a book have been in the hands of
the youth of the past generations? We should have been all the
better for it. The work seems to me to be simply and plainly
stated. With such apparent thoroughness and good sense, good
taste, I am sure the book will commend itself to every
thoughtful reader."-=-Dr. Chas. M. Stuart, Garrett Biblical
Institute, Evanston, Illinois.=

[Illustration: (signed) Yours sincerely
Winfield S. Hall]

* * * * *

THE BIOLOGY, PHYSIOLOGY AND SOCIOLOGY OF REPRODUCTION

Also Sexual Hygiene with Special Reference to the Male.

by

WINFIELD S. HALL, Ph.D. (Leipzig), M.D., (Leipzig),

Professor of Physiology, Northwestern University Medical
School, Chicago; Member of the American Physiological
Society; Chairman of the Section of Pathology and Physiology,
American Medical Association 1904-5; Fellow of
The American Academy of Medicine, President
1905-6; Fellow of American Association for the
Advancement of Science, Etc., Etc.

Twelfth Edition

1911

Wynnewood Publishing Co.
2421 Dearborn St.,
Chicago.

Copyright
1907
by Winfield S. Hall

To the YOUNG MAN, who is
devoting years of his life to
secure the HIGHEST DEGREE OF
DEVELOPMENT of those powers
of BODY and MIND that are to
be HIS INSTRUMENTS in solving
LIFE'S PROBLEMS, this little
volume is DEDICATED in the
s