150 NEED OF EXCRETION. 



leading to the sewer clogged, than to have the water supply 

 cut off. It is often more to be desired that the garbage cart 

 take away decaying matter, than that the bread wagon arrive. 

 The demands of nature for the expulsion of excreta are im- 

 perative, while we can withstand the cravings of hunger for a 

 while. So we shall turn our attention for the present to the 

 immediate demand for the removal of wastes, and later con- 

 sider the equally important, but less importunate, question of 

 supply and renewal. 



READING. (1) Bacteria, (2) Dust and Its Dangers, (3) Drink- 

 ing Water and Ice Supplies, Prudden ; Ventilation and 

 Warming of School Buildings, Morrison ; Sanitary Condi- 

 tions of School-Houses, Lincoln (American Public Health 

 Association) ; Disinfection and Individual Prophylaxis 

 against Infectious Diseases, Sternberg (American Public 

 Health Association) ; Micro-organisms and Disease, Klein. 



