. Mining and Scientific Press . the district. I •Conclusions. M. A 8. P., Dec. 81, 1921. NOTES DEVICE TO PREVENT ACCIDENTS IN HOISTING By .1 J Bourquin 931 M. & S. P., Dec. 31, 1921. LOOSE-LEAF SYSTEM FOR FIELD-MAPS AND NOTES By John I. Rich M & S P., Dec. 81, 1921. in c \i:i MENTS REVIEW OF MINING PERSONA] THE METAL MARKET . 947 EASTERN METAL MARKET 948 INDUSTRIAL PROGRESS 949 Established Mar 24. 1860. as The Scientific Press: name changed OctoberO of the same rear to Mimnsr and Scientific Pre?* ~ Entered at the San Francisco post-office as second-class matter. Cableaddress: Pertusola Branch
. Mining and Scientific Press . the district. I •Conclusions. M. A 8. P., Dec. 81, 1921. NOTES DEVICE TO PREVENT ACCIDENTS IN HOISTING By .1 J Bourquin 931 M. & S. P., Dec. 31, 1921. LOOSE-LEAF SYSTEM FOR FIELD-MAPS AND NOTES By John I. Rich M & S P., Dec. 81, 1921. in c \i:i MENTS REVIEW OF MINING PERSONA] THE METAL MARKET . 947 EASTERN METAL MARKET 948 INDUSTRIAL PROGRESS 949 Established Mar 24. 1860. as The Scientific Press: name changed OctoberO of the same rear to Mimnsr and Scientific Pre?* ~ Entered at the San Francisco post-office as second-class matter. Cableaddress: Pertusola Branch Office.—Chicago. fiOO Fisher Bdir.: New York. 31 Nassau St :Londo, bury House. EC per copy Annual subscription, payable In advance:r-mte.: - o. S4: Canada. S5: other countries. $6. MINING AND SCIENTIFIC PRESS December 31, 1921 AERO BRANDCYANIDE \OCn° n o? et^ bV ^6 **• «tw tto».
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