nd work that have for their aim
the preservation or improvement of the health are always worth while.
_Health is its own reward._ The expression of the poet,

"Each morn to feel a fresh delight to wake to life,
To rise with bounding pulse to meet whate'er of work, of care, of
strife,
day brings to me,"

suggests the _joy_ of being well. But the ultimate realization of one's
aims and ambitions in life and the actual prolongation of one's period of
usefulness are _higher and more enduring rewards_.

*Exercises.*--1. Summarize the different laws of hygiene. Upon what one
fundamental law are these based?

2. State the important differences between a condition of health and one
of disease.

3. In what general ways may disease originate in the body?

4. Describe a model sanitary home. With what special hygienic problems has
the housekeeper to deal?

5. Describe a method of collecting a wholesome supply of cistern water.
State possible objections to well and spring water.

6. What means may be employed in preventing the spread of contagious
diseases?

7. By what means are malaria, typhoid fever, diphtheria, and tuberculosis
spread from one individual to another?

8. Why are extra precautions necessary in the recovery from certain
diseases, as typhoid fever, diphtheria, and scarlet fever?

9. How may one's vocation become a cause of disease? What conditions in
the life of a student may, if uncounteracted, lead to poor health?

10. Of what special value are the parks and pleasure grounds in a city to
the health of its inhabitants?

11. Discuss the hygienic value of work.

12. What conditions lead to the continuance of habit-forming substances
after their use has become general?

13. How is it possible for one not using alcohol to be injured by this
substance?

14. Discuss the effect of alcoholic abuse upon social environment.

15. Summarize the rewards of hygienic living.

SUMMARY OF PART II

For the maintenance of life the needs of the cells must be supplied and
_the body as a whole must be brought into proper relations with its
surroundings_. The last-named condition requires that the body be moved
from place to place; that its parts be controlled and cooerdinated; and
that it be adjusted in its various activities to external physical
conditions. To accomplish these results there are employed:

1. The skeleton, or bony framework, which preserves the form of the body
and supplies a num