HEALTH AND WELL-BEING 31 



need of a well-informed citizenship in matters of public 

 health ? What can the individual citizen do to aid in main- 

 taining public health? 



9. Mention one or more instances known to you of the 

 enforcement of pure food laws. What are the duties of 

 State Food Inspectors generally? How may violations of 

 the pure food laws be stopped? What are desirable health 

 regulations in the sale (a) of milk; (6) of fruits and vege- 

 tables ? 



10. Explain the preservation of foodstuffs (a) by employ- 

 ment of low temperatures, as in cold storage; (6) by use of 

 high temperatures, as in sterilization of milk and in canning 

 foodstuffs; (c) by use of , salt, vinegar, sugar, etc., in the 

 pickling processes ; (d) by use of smoke in the curing of 

 meats. Why then is it considered so harmful to put 

 formaldehyde in milk, boric acid in meats, and salicylic 

 (sal-i-sil'ik) acid in fruit products in order to preserve them? 



11. What are the advantages in cold storage of perish- 

 able foodstuffs? Why is there need for public control of 

 these storehouses? 



12. What revolution has been wrought in the problem of 

 food supply by the rise of the canning industry? Why is 

 the control of this industry in the interests of public health 

 a comparatively easy problem? 



LIFE, GROWTH, REST AND RECREATION 



1. How can we tell whether a tree is dead or alive ? In 

 what ways can it be decided whether an animal is dead or 

 not? In general, how may plants be distinguished from 

 animals ? The protoplasm (pro'to-plazm) of the cells in 



