150 
IOWA ACADEMY OF SCIENCES. 
The company which has recently bought the plant is 
now installing two settling tanks each with a capacity of 
43,000 gallons and two filtering tanks each ten feet in 
diameter in which the sand forming the filter is to be three 
and one-half feet deep. It is also proposed to put in a bat- 
tery of wells in gravel west of the city where there is good 
water and pump whatever can be obtained there directly 
into the main, using a gasoline engine and an automatic 
pump. 
