154 



Kansas Academy of Science. 



The lowest values for chlorine in the city supply are during high 

 time of chlorine in the river. It will be seen that the low values 

 for chlorine in the river is during the period of greatest precipita- 

 tion, and the opposite is true of the city supply. If the river had 

 the slightest effect on the ground-water composition it would un- 

 questionably show up on this supply, for, as may be seen by a 



Plate I, 



LAWRErpCE WATER CO. 



LAWREIJCC 



PUMPING STATllON/ WELLS, 





'ik' 

 ■11/ 1 



