82 7?. 5. TARR 



For the water found in the deeper sands and gravels the 

 source is believed to be the moraine which occupies the Cayuga 

 Valley from the divide nearly to the well sites, a distance of 

 over eleven miles. Numerous streams descend to this moraine, 

 supplying much more water for percolation than the mere rain- 

 fall. The moraine is to a very large degree made of sand and 

 gravel, offering the best of conditions for the entrance of water. 

 The hardness of the water and the temperature (52° in August 

 and December) both indicate a long underground journey ; and 

 the great pressure, which forces from one of the wells a steady 

 volume of 300,000 gallons a day, also indicates some fairly dis- 

 tant source. To account for the pressure observed it is necessary 

 to find a source much higher than the well sites. No such source 

 is to be found to the north because the lake occupies that region ; 

 to the east and the west rise high hills in which are nearly hor- 

 izontal strata of shale and sandstone. This leaves the moraine 

 to the south as the only possible source of the water ; and this 

 source is not only ample, but, if the above interpretation of the 

 well sections is correct, there is a direct connection between the 

 surface moraine and the buried moraine gravels which supply the 

 water. 



R. S. Tarr. 



Ithaca, N. Y, 



