72 
curing same, and how they are prepared for use. The well supplies are 
shown, giving the depth of well, the level of the water (where it has been 
possible to secure same), and roughly the depth of glacial drifts as found 
in that section; the drift depths are as given by the United States Geo- 
logical Survey. 
North of the Wabash river the depth of drift is approximately 100 
feet or over, the best wells being usually in this material. Quite a por- 
tion in the western part is the region of extinct lakes. An interesting 
comparison occurring in this extinct lake region, is the supply of Kent- 
land. This town formerly had its supply from a well about 1,200 feet 
deep, the water having a strong odor of sulphur. The water in this well 
stood 72 feet below ground about six years ago. Last year it was 120 feet 
below ground when pumping, and owing to this great lift caused muck 
trouble and expense in pumping same. 
This year a new plant was installed at Kentland. A new site was 
selected about one-half mile from the old well. The wells were drilled to 
a depth of ST feet when rock was encountered. The last 15 feet of the 
well was in white sand, aud produced a clear sparkling water without 
taste or odor. This installation is of interest as it shows such a difference 
in the two weils and their product. 
From the south of the Wabash river to the Ohio the drift varies from 
5 to 100 feet in depth, except for a triangular shaped section, with the 
apex below Martinsville, which is practically in the rock section. The 
water works of English in this region are of more than passing interest, 
as the supply of the town is secured from an elevation high enough to 
give pressure withont pumping. 
It will be noted on the map, that of supplies shown in the rock country, 
the majority are springs or river supplies. The procuring of water 
in quantities sufficient for public use is in some parts of this district a very 
difficult problem, especially in dry seasons. 
The water of the State can be divided inte two main classes, surface 
and subterranean supplies. The surface supplies comprise the river, lakes 
and large surface wells or reservoirs and may be divided into the filtered 
and unfiltered classes. The subterranean waters consist of the deep wells, 
flowing or unflowing, and springs. 
The most noteworthy characteristic of the surface waters is that they 
are as a rule softer than the well waters and after filtration usually make 
a very satisfactory supply. The well waters as a rule are harder and in 
