THIS edition of Part 3 of Winchell's “Elements of Optical Mineralogy”, now published separately, entirely supersedes the earlier edition, which was incorporated with Parts 1 and 2 in one volume.
THE descriptive part of Winchell's “Optical Mineralogy” has been completely rewritten and much enlarged to form the second edition. With the exception of a few of the commoner opaque minerals, there ...
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