HYDROLOGY. 153 



The analysis is an approximate, leaving off decimals in calculating the proportions. 

 In 100 parts, the following are the proportions of each ingredient: 



1. Carbonate of lime 5 



2. Carbonate of potash 4 



3. Carbonate of magnesia 6 



4. Carbonate of soda 4 



5. Sulphate of lime 12 



6. Sulphate of potash , 10 



7. Sulphate of magnesia 17 



8. Sulphate of soda 13 



9. Chloride of sodium 14 



10. Chloride of potassium 3 



11. Silica 5 



93 



12. Traces of iron 



14. Traces of bromine 



14. Free carbonic acid 



Wa^te 7 



100 



To my surprise, I found a trace of bromine in it. 1 did not estimate the free carbonic 

 acid. Very respectfully yours, E. J. GILLETT. 



The water has been extensively used for its remedial qualities. 

 The magnificent fountain on First street, belonging to Messrs. B. 

 "Wild & Co., represents a yet more deep seated system. This well is 

 326 feet deep, and passes entirely through the Galena and Trenton 

 limestones, reaching the St. Peters sandstone below, whence it derives 

 a flow of forty-eight gallons per minute. The stream has been carried 

 by pipes 53 feet above the surface. It flows with such force that, 

 with hose and quarter-inch nozzle attached, it projects a stream from 

 30 to 35 feet high, and 48 feet horizontally. An analysis of the water 

 of this well will be found in the report of Dr. Lapham, ante, p. 31, of 

 this volume. 



The following is the section of the well on the high school grounds, 

 kindly furnished by Senator "W. H. Hiner: 



Feet. 



Drift, red and blue clay 95 



Magnesian limestone (Trenton and Galena) 195 



St. Peters sandstone 135 



Total 425 



In searching for the fountain head of the first class, or those which 

 belong entirely to the drift, we find possible sources on almost every 

 side, to the east, south, west and northwest. To the east and south 



