f nutrition; while the rate of secretion from the vesicles is greatly
modified in quantity. This accounts for the fact that well nourished
men who eat heavily are very likely to experience frequent nocturnal
emissions, when living continently.

LECTURES
by the
Author of Reproduction and Sexual Hygiene.

THE YOUNG MAN'S PROBLEM.

Heard by 20,000 men last year.

WHAT IS SAID ABOUT IT.

The Young Men's Christian Association of Philadelphia.
Walter M. Wood, General Secretary

October 17, 1908.
To Whom it May Concern:

It is with great pleasure that I pay a tribute of appreciation
to the excellent service of Dr. Winfield S. Hall, in his
presentation to audiences of young men of the vital problems of
sexual hygiene.

With the intelligence of a trained and experienced physician,
with the thoroughness and frankness of an expert teacher and
with the delicacy and motive of a Christian gentleman, he
presents the "Young Man's Problem" in such a way as to make him,
in my judgment, one of the most helpful counselors of young men
on the American platform today.

Sincerely,
W.M. WOOD.

University of Notre Dame.

Winfield Scott Hall, M.D.,
Northwestern University Medical School.

My Dear Dr. Hall:

In your lecture on "The Young Man's Problem" and in your book on
"Sexual Hygiene" you are doing a great service for the rising
generation. I am convinced that one great source of vice is
ignorance about the matters touched upon in your lecture and
book. Priests are constantly giving instruction on these same
points, but it is a distinct advantage to have their teaching
reinforced by a distinguished physician, expressing himself with
the plainness of the laity and speaking always in a most
reverential spirit. For students seventeen years of age or more
your presentation of this difficult subject will be a God-send,
for it abates curiosity, dissipates ignorance, warns of perils
and arouses a manly desire for a clean life.

Very sincerely yours,
JOHN CAVANAUGH, C.S.C.,
President.

Central Department, Young Men's Christian Association, Chicago.