IOWA ACADEMY OP SCIENCES. 
71 
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 
were obtained. 
The surface at the well is 685 feet .above tide. 
Number. 
SECTION. 
Thickness in 
feet. 
Depth in feet. 
66 
Loess and drift 
18 
18 
65 
Limestone and chert, drillings coarse 
23 
41 
64 
Limestone, much less chert, drillings finer 
37 
78 
63 
Limestone, light bulf, fine grained 
19 
97 
62 
Limestone, yellowish, sandy, cherty — 
13 
no 
61 
Shale, sandy, with some lime 
39 
149 
