Publisher's Synopsis
Excerpt from Report on the Lead and Zinc Deposits of Wisconsin: With an Atlas of Detailed Maps
The ores mined are galena or mineral (sulphide of lead), smithsonite or dry-bone (carbonate of zinc), and sphalerite or black-jack (sulphide of zinc). In relative amount of pro duction sphalerite is the most important, galena of less import ance, and smithsonite less still. The future will undoubtedly witness a continued increase in the importance of sphalerite.
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