384 



In Raisinville, section 19, is a strongly impregnated spring, discharg- 

 ing water sufBcient to form a brook. 



Another, "on section 25, forms the head of Plumb creek. 



A spring of moderate strength issues from the margin of the Raisin, 

 half a mile below Dundee. 



A strong spring of sulphur and iron is said to be found on Stony 

 creek, town of Exeter, section 21. 



On Swan creek, town of Ash, are springs impregnated with sulphur 

 and iron. One on section 36 ascends in a curb sevtral feet above the 

 level of the stream. 



These springs all afford a copious supply, and are unaffected by a 

 drought which renders dry the channels of neighboring streams. This 

 fact, with that of their rise above the level of surrounding waters, and 

 their strong impregnation with the minerals, sulphur, lime and iron, 

 proves that they have distant sources, and that they proceed from great 

 depths below the surface. 



STREAMS AND SPRINGS. 



This county is intersected by a number of considerable streams, fol- 

 lowing a parallel course to the lake; but small branches do not abound, 

 as in a country of more broken surface. Most of the streams supply a 

 hard water. 



Water is obtained generally without difficulty from wells and springs 

 affording a good supply, extremely hard. It is occasionally impregna- 

 ted with sulphur and iron, owing to the proximity of the limerock. 



Several wells in the towns of Ash, Lasalle and Ida, sunk twenty feet 

 to rock, opened veins which filled them suddenly, causing them to 

 overflow. 



Wells on the plains, which do not descend to the clay, are generally 

 soft; so that by proper precautions, water free from lime may be ob- 

 tained in those situations. 



BOG ORE. 



Several deposits of this mineral occur in the neighborhood of Peters- 

 burgh and Dundee. The ore is much mixed with silicious matter, and 

 none of it can be considered of the best quality. 



On section 19, township of Summerfiekl, ore is formed on the bor- 

 ders of a marsh of about ten acres. The marsh is fed by springs, and 



