402 THE GEOLOGY OF MINNESOTA. 



[Springs. Pottery. 



At the south side of the southwest quarter of section 29 are two flowing wells, the only ones 

 learned of in this vicinity. The westmost, in the corner of this section, dug 16 feet and bored 18 

 feet lower, to a total of 34 feet, owned by Frank Truhlar, has been flowing twelve years. The 

 other, about a third of a mile farther east, on John Chambers 1 farm, rented to L. L. Inman. is 

 thought to be of nearly the siur.e depth. 



Mertan. James Gibson; sec. 8: well 47 feet; soil, 2; yellow till, 10; blue till, spaded, 35; water 

 stands 27 feet deep, rising from the bottom. 



Somerset. G. Storer; sec. 33: well, 21 feet; soil, 2; yellow till, 8; harder blue till, 10; sand, 1 foot 

 and extending lower, from which water rose 11 feet. 



Lemond. C. G. Hersey; N. E. J of sec. 21: well, 51 feet; soil, 2 feet; very hard yellow till, 10 

 feet; sand, 4 inches, containing water; blue till, picked, about equal in hardness with the yellow till, 

 39 feet, containing no layers of gravel or sand and no water. 



Owatonna. In wells about Owatonna, sticks or fragments of wood are occasionally found 

 in the till 30 to 50 feet below the surface; and a layer of peat is reported to occur under a consid- 

 erable depth of drift, about three miles south of the city. 



Mineral springs. The Owatonna mineral springs should be mentioned. 

 They are nine in number, and are located about one and a half miles north- 

 east of the city. They lie along Maple creek at the base of a low clayey 

 bluff. Of the five seen by the writer, four deposited iron. The water of 

 the fifth had a decidedly bluish tint. Fountain spring comes through a 

 pipe that was put down twenty -two feet; the water flows out freely, rising 

 about five feet above the surface. The others are natural springs. They 

 are all undoubtedly due to the clay-floor underlying the loose material of 

 the drift. The taste of the water in the five visited by me was slightly 

 mineral. The analysis of the water, published by the Owatonna Mineral 

 Springs company is appended. To which of the springs this analysis be- 

 longed could not be ascertained. 

 In one gallon, or 231 cubic inches, there are: 



Chloride of sodium 1680 grains. 



Sulphate of sodium 2856 grains. 



Bicarbonate of sodium 1.8592 grains. 



Bicarbonate of calcium 13.1992 grains. 



Bicarbonate of magnesium 5.2920 grains. 



Bicarbonate of protoxide of iron 6160 grains. 



Alumina 280 grains- 

 Silica ! 120 grains. 



Organic matter _ a tra ce. 



Total 22.8200 grains. 



Pottery and brick. Cornell Brothers, at Owatonna, manufacture stone 

 ware. The clay employed is a fine, rich, plastic, blue clay, obtained from 

 Eldora, Hardin county, Iowa. This bed of clay is being exhausted, and its 

 quality is deteriorating. This has determined the firm to try a gray clay 

 found about one mile east of Owatonna. This is the same layer of clay 

 which crops out at the mineral springs near the city. It has been found 



