XXIV. MAN'S IMPROVEMENT OF HIS ENVIRONMENT 



Problems. How may we improve our home conditions of 

 living? 



How may we help improve our conditions at school? 



How does the city care for the improvement of our environ 

 ment f 



(a) In inspection of buildings, etc. 



(#) In inspection of food supplies. 



(c) In inspection of millc. 



(d) In care of water supplies. 



(e) In disposal of wastes. 

 (/) In care of public health. 



LABORATORY SUGGESTIONS 



Home exercise. How to ventilate my bedroom. 



Demonstration. Effect of use of duster and damp cloth upon bacteria 

 in schoolroom. 



Home exercise. Luncheon dietaries. 



Home exercise. Sanitary map of my own block. 



Demonstration. The bacterial content of milk of various grades and 

 from different sources. 



Demonstration. Bacterial content of distilled water, rain water, tap 

 water, dilute sewage. 



Laboratory exercise. Study of board of health tables to plot curves 

 of mortality from certain diseases during certain times of year. 



. The Purpose of this Chapter. In the preceding chapters we 

 have traced the lives of both plants and animals within their own 

 environment. We have seen that man, as well as plants and other 

 animals, needs a favorable environment in order to live in comfort 

 and health. It will be the purpose of the following pages first to 

 show how we as individuals may better our home environment, 

 and secondly, to see how we may aid the civic authorities in the 

 betterment of conditions in the city in which we live. 



373 



