QUESTIONS AND REFERENCES 277 



8. What is the principle underlying the antitoxin treatment for diphtheria ? 

 The Schick test ? The Dick test ? 



9. What is the principle underlying vaccination against smallpox, against 

 typhoid, against boils? Explain. 



10. Make a list of all germ diseases that are now treated by the passive 

 method of immunity ; the active method of immunity. 



Problem and Project References 



Hunter, Laboratory Problems in Civic Biology. American Book Company. 

 Broadhurst, How We Resist Disease. J. B. Lippincott Company. 

 Broadhurst, Home and Community Hygiene. J. B. Lippincott Company. 

 Sharp, Foundation of Health. Lea and Febiger, 

 Winslow, Healthy Living. Charles E. Merrill Company. 

 Zinsser, Infection and Resistance. The Macmillan Company. 



new civ. BIOL. — 19 



