*Summary.*—To solve the problem of keeping well, one must live the life which is in closest harmony with the plan of the body. Such a life, because of differences in physical organization, as well as differences in environment and occupation, cannot be the same for all. All, however, may observe the conditions under which the body can be used without injuring it and the special hygienic laws relative to the care of different organs. Causes of disease, whether they be in one’s environment, vocation, in his use of foods or drugs, or in his mode of recreation, must either be avoided or counteracted. While the problem is beset with such difficulties as lack of sufficient knowledge, inherited weakness, and time and opportunity for doing what is known to be best for the body, yet study and 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