IOWA ACADEMY OF SCIENCES. 7[ 



week, with no appreciable lowering of the head. At 2,430 

 feet, where the work was stopped, the pump was again put in 

 and over 100,000 gallons were thrown out daily, for ten days, 

 without lowering the head. 



No analyses of the waters have yet been made. The water 

 pumped out after the drilling was stopped, and which was 

 probably composed of a mixture from the different levels, was 

 clear and sparkling and remarkably free from objectionable 

 mineral tastes. It was slightly diuretic and laxative. No 

 extended experiments have as yet been made in using the 

 water for park irrigation, which was one of the main purposes 

 in putting down the well. It is hoped that the supply will be 

 great enough to feed an artificial lake and a fountain or two. 

 The pumping will probably be done by electrical power. 



Through the kindness of the Tweedy Brothers, who carried 

 the drilling down to 1,700 feet, and the Wilson Brothers, who 

 finished the work, a very complete series of samples of the 

 drillings came into my possession. From these, glass tubes 

 have been filled, one being placed in the public library and 

 another in the high school at Burlington, each showing, 

 approximately, a complete section of the well. At four 

 different levels the drillings were washed away by the pressure 

 of the water from below, the material doubtless finding its way 

 into crevices through which the well passes at higher levels. 

 There were four of these intervals when no samples were 

 obtained, the first at 1,475 feet, and continuing for forty-four 

 feet; the second at 1,630 feet, and continuing for forty feet; 

 the third from 1,725 feet to 2,000 feet, making a long interval 

 of 275 feet; and the fourth from 2,360 feet to 2,400 feet, equal 

 ing forty feet, making 400 feet in all from which no drillings 

 Avere obtained. 



The surface at the well is 685 feet above tide. 



Loess and drift 



Limestone and cliert, driUing-s coarse 



Limestone, much less chert, driUing-s finer. 



Limestone, light buff, fine grained 



Limestone, yellowish, sandy, cherty 



Shale, sandy, with some lime 



