376 BIOLOGY AND HUMAN LIFE 



New conditions resulting from industrial changes 

 Contamination of air with dust, fumes, smoke, etc. 

 Disagreeable odors 

 Noises 

 Desirable physical conditions 



Light and air Beautiful surroundings and 



Nearness to parks and play- outlook 



grounds, to schools, and Drainage 



to place of work Adequate water supply 



Large rooms Weatherproof walls and roof 



Clean surroundings Suitable heating arrangements 



Quiet surroundings Dirt and vermin-proof tloors, 



• walls, and ceilings 

 City planning 



3. Cleanliness and sanitation 



Relation of cleanliness to physical and mental health 

 The cost of cleanliness 

 The importance of water 



For bathing, washing clothes, etc. ; for removing refuse 

 Protection of water supply 



In the country ; in the city 

 Disposal of garbage 



Why important ; methods 

 Handling of food 



In relation to infection etc. ; in relation to vermin 

 Prevention of infections from a patient 



Disposal of discharges 



Fumigation and sterilization 



Cleaning of clothing, bedclothes, etc. 



4. Food and feeding in the home 



Relation to nutrition and health of its members 



Relation to cultivation of tastes and manners 



Relation to education in food values 



Importance of careful marketing 



Importance of proper preparation, storage, and service 



Method of preserving from bacterial action 



5. Sleep and rest 



Importance of suitable sleeping quarters Regular hours 

 Outdoor air for sleeping Good sleeping habits 



Suitable bedclothes Afternoon nap 



Amount of sleep 



