HYDROLOGY. 163 



Feet. 



Drift 147 



Niagara limestone 233 



Cinciiinati shale 200 



Trenton and Galena limestones 285 



St. Peters sandstone (small flow) 100 



Lower Magnesian limestone 141 



Potsdam sandstone 157 



Total 1263 



The record says that fifteen feet of limestone were passed throiigh 

 in this lower sandstone; but at what depth is not stated. It also 

 adds that red rock mingled with the sand from below. These facts 

 leave no doubt that this is the Mendota limestone, which, at the 

 typical locality near Madison, has its upper surface 35 feet below the 

 superior face of the sandstone. 



The surface of this well is 14J: feet above Lake Michigan, and hence 

 its bottom is 541 feet beneath the ocean level. The water rose at. the 

 time of drilling to the height of 40 feet above the surface, or 184 feet 

 above Lake Michigan. As only a few points in the eastern part of E.a- 

 cine and Kenosha counties exceed that elevation, this well has demon- 

 strated the possibility of obtaining fountains over a considerable area. 



At Eacine a fine flowing well has recently been secured, of which 

 Dr. P. E. Hoy has kindly furnished nie the data which show the 



folio wina: section: 



^- Feet. 



Drift 115 



Niagara limestone • 305 



Cincinnati shale ' • 185 



Galena and Trenton limestones 283 



St. Peters sandstone 48 



Lower Magnesian limestone 100 



Potsdam group — 



MadLson sandstone 47 ... 



Mendota limestone 31 



Bed sandstone HO •• • 



Hard sandstone 10 



Soft sandstone 6 .... 



204 



Totaldepth ^ 



"When the St. Peter's sandstone was reached, a flow was secured, 

 (vhich was increased on reaching the Madison, and still further 

 augmented when the soft sandstone was struck. The water rose in a 

 tube 65 feet above the surface. This record is valuable in that it 

 demonstrates the existence of three water-bearing strata above the 

 middle Potsdam. 



