IOWA ACADEMY OP SCIENCES. 
35 
strong current of water. The water which had remained at a 
level of nearly 100 feet below the surface immediately sunk, but 
after some time returned to nearly the same level as before. 
The drillings continued to a depth of 2,002 feet, where the 
sample discloses a white limestone, slightly dolomitic. It is also 
very arenaceous, containing nearly half its bulk of irregular 
grains of pure white translucent quartz. It is probable that 
this is among the lower members of the Oneota limestone. 
Up to this time the flow of impure water found at the top of 
the Saint Louis had resisted all efforts to check it, and hence, all 
the water found below was tainted by it. A means was at last 
devised by which it was entirely checked. The water at the 
lower level was found to be of good quality, and to have a mod- 
erate flow, coming to within 230 feet of the surface. 
During the month an average of 12,800 gallons were pumped 
every twenty-four hours; while during the summer months very 
much more was used without diminishing the flow. 
A careful analysis of the water was made by Mr. Verbeck of 
the department of chemistry, at Iowa College, the results of 
which are here given: 
GRAINS 
Calcium carbonate 7 
Calcium sulphate 41.1 
Magnesium sulphate 30 
Sodium sulphate 27.34 
Sodium chloride .87 
Silica iron and alumina 7 
Total solids at 120°C 120.75 
Hardness in degree 44 
The water is universally liked and very generally used. No 
bad effects from its use have been noticed. 
