(3) The heart and athletics: Importance of being "in condition"
for competition in games; focal, and general infections in
relation to exercise; periodic health examination in control
of individual, school, and other programs of physical edu-
cation. Evidence pro and con.

(4) Exercise in relation to posture, "personality," nervous
stability; applications of exercise as a corrective,
remedial, or therapeutic agent.

(5) Summary.

REFERENCES :

*Storey, T.eA,--Principles of Hygiene (1930) pp 152-160
, “Martin, HeN. and E.G.e--The Human Body, llth Edition, pp 101-176
including chapter on nervous system.

Williams, J»eF.--Athletics in’ Education (1930) pp 66-115

*Williams, J,F.--Personal Hygiene Applied, 2nd Edition, pp 111-130

Martin, HeG. and Weymouth, F.W.--Elements of Physiology, pp 78-133,
including section on nervous system.

Meredith, F,L.--Hygiene (1926) pp 92-118

Cowdry, EZ. V.--Human Biology and Social Welfare

*Hough, Sedgwick and Waddell--The Human Mechanism, Revised Edition,
(1918) pp. 297-326

Bainbridge, F. A.--The Physiology of Muscular Exercise (1919),
pp 1-22, 171-201

MeCurdy , J+He and McKenzie,R.T.--Physiology of Exercise, pp 45-71,

-68-110, 189-221

*Kirkpatrick and Huettner--Fundamentals of Health (1931) Chaps. 6 and

7, DD. 190-273, part of Chap. 10, pp 341-354.

*Reauired

VII-e PLAY, the fifth determining force in Constructive Hygiene

A.

INTRODUCTION :

"Play is a basic activity requisite for the acquisition and conserva-
tion of mental and physical growth and health."--Storey

Play may be said to be innate tendency (an “impulse,” and 'urge," a
"drive") to activity, the purpose of which is development and education
leading to adult adjustment to social and material environment; play is
activity in which the whole personality is enlisted; chief business of
childhood is play. Through play, the child's menti motor, organic,
impulsive (or emotional), and interpretative (or intellectual) mechan-
isms are developed, strengthened, and integrated, This is why play isa
"basic activity."

Above consideration has been given to various bodily systems and their
functions as if cach were an entity. Human life and health are products
of the harmonious working together, or integration, of all of these
systems and all of their activities brought about through — the nervous
system. The gel general structures and functions of the nervous system were