Wis. Geol. and Natural Hist. Survey. 
Plate II. 
AN IMPLEMENT FOR LIFTING AND REMOVING LARGE BOULDERS. 
While these stones are undesirable, and interfere with the cultivation 
of the land, it is usually true that where they occur the soil itself is of 
good quality. 
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SHOWING SURFACE FEATURES TYPICAL OF THE SUPERIOR 
SERIES OF SOILS. 
This Superior soil has a high agricultural value. 
