Central Northern Wells chief source; Counties springs, streams, and tiles used to a considerable extent. Northeast Counties Streams, wells, and springs used about equally. Eastern Counties Wells chiefly; streams next; ponds and tile drains follow in the order named; nine instances of springs. Central Counties Forty-nine districts report wells; forty report streams; thirty-five tile drains; twenty-five ponds; twenty-four springs. Western Counties Wells and tile drains equal; springs next; ponds in a few instances. 4 Southern Counties Ponds and streams equal; six report wells; five report springs; four tile drains. 21 Central S. Counties Ponds chiefly; streams next; wells next; springs and tiles in the order named. Southeast and Southwest Counties A like condition: ponds, streams, and springs. "From all parts of the state, correspondents wrote that the ponds and streams become stagnant in the warm months of summer, a few making exception of those years in which rainfall has been heavy during the summer months. Stagnant water is found more generally in the southern than in the northern part of Illinois; chiefly, perhaps, because the cultivation and drainage of the land has not become almost universal as it has in the northern districts." In several counties artesian wells afford a most copious supply of water of good quality. In Iroquois and other eastern counties, such wells have been bored to a depth of from 150 to 200 feet and obtained an unfailing flow of water impregnated with minerals. Stock show a strong liking for such water after becoming accustomed to its use, and it is the belief of those who have had opportunity for observing the effects of its continued use, that this mineral water serves to keep the animals free from disorders which formerly prevailed in that region. This seems to be especially apparent in regard to malarial disorders. _People_