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<p>Book digitized by Google and uploaded to the Internet Archive by user tpb.
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<br>Subjects: mineral; upper; east; rock; lower; openings; iron; diggings; ore; west; lower bed; blue limestone; upper bed; upper magnesian; west side; east side; lower magnesian; flat openings; glass rock; mineral point</div>
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Wisconsin Geological Survey,  Wisconsin ,  State Geologist</div>
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