PROSPECTOR'SlSGi FIELD-BOOK AND GUIDE
IN THE SEARCH FOR AND THE EASY DETERMINATION OF ORES AND OTHER USEFUL MINERALS
Author of "Metallurgy of Iron and Steel," "'Practical Manual of Minerals, Mines and Mining"
9 a. ■
NINTH EDITION THOROUGHLY REVISED AND ENLARGED
M. W. von BERNEWITZ
Metallurgist and Technical Journalist; Formerly Assistant Editor of "Mining and Scientific Press" and "The M.nes Handbook;"' Contributor to The Mineral Industry" and other Publications
ILLUSTRATED BY F^FTY-SEVEN ENGRAVINGS
NEW YORK HENRY CAREY BAIRD & CO., Inc.
Publishers of Mechanical and Industrial Books 2 West 45th Street 1928