52 GENERAL SCIENCE 



8. Distinguish between (a) infectious and contagious diseases; (b] antiseptic 

 treatments and sterilization. 



9. Wherein lies the great worth of formalin as a disinfectant? 



10. Of the various disinfectants whose solutions are used, which is perhaps 

 the most generally satisfactory for treatment of waste material from sick 

 rooms? 



11. What is a wise course in the matter (a) of wearing other people's clothing; 



(6) of using public drinking cups and towels? 



12. What possible dangers are there in the use of public plunge baths and 

 swimming pools? 



13. What sanitary purpose is served by cooking all meats? In the canning of 

 perishable foodstuffs, upon what does their preservation depend? 



14. How is a case of any contagious disease to be accounted for when so far 

 as known the patient has not been "exposed?" 



16. About how many years is it since Pasteur's use of the microscope laid the 

 foundations of bacteriology? Tell something of his early discoveries. 

 Mention other men whose researches have made notable advances in this 

 field of science. 



16. What is a necessary course to pursue with fruits and vegetables from the 



market which are to be served at table without being cooked? Name 

 several fruits and vegetables eaten uncooked. 



17. Under what conditions might ailments ordinarily not quarantined, such 

 as whooping-cough, prove serious and even fatal? 



18. What are the usual restrictions placed upon people when quarantined? 



19. Of vaccination for the prevention of typhoid fever tell (a) how it. is done; 



(b) what the vaccine is. 



THE WATER SUPPLY AND HEALTH 



An attempt to list the various uses of water, and to state 

 the part that it plays in the economy of nature and the wel- 

 fare of men, proves highly instructive. The extent of its 

 uses is scarcely more striking than is the abundance of the 

 supply needed for these uses. The round of changes in place 

 and form undergone by water in the economy of nature is 

 one of the marvels of the natural world. In cities provision 

 must be made to furnish water for drinking purposes, for 

 cooking foods, for use as steam power in mills, shops, and 

 factories, and for heating dwellings and other buildings. An 

 enormous supply is necessary for the disposal of sewage, for 

 fire protection, for laundry and bathroom, for lawn and 



