1 82 LOWER PENINSULA. 



Portsmouth, Bay County, Michigan. Depth of well, 664 feet. 

 Brine, 54° by salinometer. 



Sulphate of lime (gypsum) 0.4884 



Chloride of calcium O.3472 



" magnesium 0.4333 



" sodium (salt) 12.5315 



Saline matter 13.8004 



Water 86.1996 



100.0000 



Gillmore Well, Bay City, Michigan. Depth of well, 505 feet. 

 Brine, 65° by salinometer. 



Sulphate of lime (gypsum) 0.3961 



Chloride of calcium 0.5302 



" magnesium 0.41 1 5 



" sodium (salt) 15.2674 



Saline matter 16.6052 



Water 83.3948 



100.0000 



The two brines, as the depth of the wells will show, are from the 

 upper salt-bearing sand rock, and are quite characteristic of this 

 formation, as shown by the large percentage of gypsum and low 

 percentage of chlorides. 



Swift & Lockwood's Well, Saginaw City. Depth of well, 860 feet. 

 Brine, 86° salinometer. 



Sulphate of lime (gypsum) . 0.0983 



Chloride of calcium 2.6430 



" magnesium 1.0685 



" sodium (salt) 17.5 103 



Saline matter 21.3201 



Water 78.6799 



100.0000 



