A METHOD OF DIRECT AERATION OF STORED WATERS. 
BY 
WILL Scorr AND A. L. FOLEY. 
The purpose of this paper is to describe a simple apparatus for the eco- 
nomic aeration of stored waters. The apparatus has been installed at the 
impounding reservoir and pumping station of the Indiana University water 
system. 
CROW'S FOOT AIR NOZZLE. 
DETAIL OF NOZZLE 
LOWER SIDE 
Figure 1. Shows the arangement of the air duct and nozzle in relation 
to the dam and the water level. 
The impounding basin of this system is a dammed V-shaped valley, hay- 
ing the characteristic steep slopes of this valley type. These slopes are un- 
derlaid with the shales of the knobstone except at the upper levels where 
the shale is replaced with limestone. The knobstone is covered with a thin 
layer of soil on which it is difficult if not impossible to grow grass, partly 
