166 
IOWA ACADEMY OF SCIENCE Voi,. XXVII, 1920 
character is sometimes obtained from the valley bottoms under 
thick beds of clay.” 
This water affords another good illustration of how the char- 
acter of the rock and soil determines the quality of the water in 
the region. 
Our thanks are due Dr. Nelson O. Brooks, physician of the 
board of health of the city of Oneida, New York, for his interest 
in sending us the sample of water for this analysis. 
Sample No. 2 . — This is a shallow well, only twelve feet in 
depth, also from Oneida county. New York, near Fish creek, 
possibly eighteen or twenty miles distant from the well described 
in No. 1. The analysis is as follows, in parts per million; 
Total solid residue in platinum dish 186.4 
Si02 ! 2.6 
Fe 203 and AbOa 1.8 
CaCOa 99.6 
CaS04 27.0 
MgCOa 47.40 
NaCl and KCl 11.80 
Free Ammonia 00.00 
Albuminoid ammonia • • . . 00.00 
Nitrogen in nitrates 0.10 
Nitrogen in nitrites 0.002 
The water is also pure and soft as would be expected from the 
locality in which the shallow well is located. It is in the pure 
white sand about half a mile distant from Oneida lake. The 
water doubtless comes from the lake and so would have half a 
mile of a pure sand filter. This would easily account for its 
freedom from organic contamination and softness and absence 
of much solid matter in solution. 
We desire to express our thanks to James L. Bentley for send- 
ing us the sample of water. 
Department oe Chemistry, 
Cornell College. 
