STATE GEOLOGIST. 1ST 



"Dr. Houghton in his report of 1838, gave the results of 

 analyses of 20 different brine springs i'rom our Slate, two of 

 which have been reproduced in the table. Of these ^piings, 

 three were situated upon the Tittabawasscc river, in Midland 

 county, seven near the Grand river, two near the source of 

 navigation of Maple river, in Gratiot county, two near the 

 Maple river, in Clinton county, and one near the Saline river, 

 in Washtenaw county. The solid constituents of these brims- 

 contained from 58 to 87 per cent, of pure salt, the general 

 range being 70 to 86 per cent. The purest brine was found on. 

 section 24, T. 15 N , 1 W., Midland county, on the the Tittaba- 

 wasse river, half a mile above the mouth of Salt river. 



The following table will also prove useful for general refer- 

 ence: 



