XXIV. MAN'S IMPROVEMENT OF HIS ENVIRON- 

 MENT 



Problems. — How may we improve our home conditions of 

 living f 



How may we help improve our conditions at school ? 



How does the city care for the improvement of our environ- 

 ment ? 



(a) In inspection of buildings, etc. 



(b) In inspection of food supplies. 



(c) In inspection of milk, 

 id) In care of water supplies, 

 (e) In disposal of wastes, 

 if) In care of public health. 



Laboratory Suggestions 



Home exercise. — How to ventilate my bedroom. 



Demonstration. — Effect of use of duster and damp cloth upon bac- 

 teria 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. 



Note to Teachers. — The exercises which follow are intended to be suggestive 

 and may be extended indefinitely as time may permit. To make this work of 

 most value, as much collateral reading as can well be made available should be used 

 in addition to the definitely planned home and laboratory work outlined in the 

 following chapter. Field work is of especial importance in this connection as it 

 shows the pupils what the city departments arc doing toward the inspection of 

 factories, care of food supplies, inspection of milk, both in production and in the 

 sale, provision for a safe and ample water supply, disposal of wastes and care of the 

 public health. An effort should be made to have each pupil procure a copy of the 



262 



