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 spirit of FRATERNITY.
THE AUTHOR.