Volume 66
Containing the Papers and Discussions on Mining, Milling, Geology and Coal
Title Page
Preface
Contents
Officers
Honorary Members

PROCEEDINGS OF MEETINGS

MEETING DATE
Lake Superior Meeting August, 1920
New York Meeting February, 1921
Semi-Centennial Meeting, Wilkes-Barre, Pa. September, 1921

PAPERS:

LAKE SUPERIOR MEETING August, 1920

TITLE AUTHOR
Geology and Ore Deposits of the Jerome District Louis E. Reber, Jr.
The Dip Needle in Stratigraphy (with Discussion) H. R. Aldrich
Application of Ball-mills in Southeast Missouri Lewis A. Delano and Harold Rabling
Mining Methods and Costs at the United Verde Mine (with Discussion) H. DeWitt Smith and W. H. Sirdevan
Standardizing by North Butte Mining Co. (with Discussion) Robert Linton
Athens System of Mining (with Discussion) S. R. Elliott
Building Reinforced-concrete Shaft Horses (with Discussion) J. Ellzey Hayden and Lucien Eaton
Hoisting Equipment at Utah-Apex Mine (with Discussion) Joseph A. Norden and A. R. Willson
Mine-Water Neutralizing Plant at Calumet Mine (with Discussion) L. D. Tracy
Steam Regenerators Reduce Coal Consumption (with Discussion) W. H. Schacht
Care of Rock Drills H. R. Drullard
Handling and Treatment of Rock-drill Steel at Copper Range Mines (with Discussion) H. T. Mercer and A. C. Paulson

NEW YORK MEETING February, 1921

TITLE AUTHOR
Geology of Pachuca and El Oro, Mexico (with Discussion) H. V. Winchell
Rate of Formation of Copper Sulfate Stalactites (with Discussion) Graham John Mitchell
Judging the Quality of Portland Cement (with Discussion) R. J. Colony
Important Factors in Talc Milling Efficiency (with Discussion) Raymond B. Ladoo
Calculation of Ore Tonnage and Grade from Drill-hole Samples (with Discussion) James E. Harding
Dust-ventilation Studies in Metal Mines (with Discussion) D. Harrington
Alaska Coal Fields (with Discussion) George Watkin Evans
Skip Hoisting for Coal Mines (with Discussion) A Allen and J. A. Garcia
Coal-pillar Drawing Methods in Europe (with Discussion) G. S. Rice
Pillar Drawing in Thick Coal Seams G. B. Pryde and R. M. Magraw
Run-off and Mine Draining (with Discussion) H. N. Eavenson
Time Factor in Depletion of Mines John W. Roberts
Relation of Air Pressure to Drilling Speeds of Hammer Drills (with Discussion) H. W. Seamon
Breakage and Heat Treatment of Rock-drill Steel Benj. F. Tillson
Heat Treatment of Rock-drill Steel G. H. Gilman
Analysis of Some Drill-steel Tests F. B. Foley
Application of Magnetic Analysis to Rock Drills C. W. Burrows

WILKES-BARRE MEETING September, 1921

TITLE AUTHOR
General Geology of Catorce Mining District C. L. Baker
Relation of Gypsum Supplies to Mining D. H. Newland
Octagonal Ventilation Shaft of David-Daly Copper Co. (with Discussion) J. L. Bruce
Geology of Namma Coal Field, Burma Edel Moldenke
New Features in Structural Geology of Anthracite Basins James F. Kemp
Mine Fires Extinguished by Sealing (with Discussion) Douglas Bunting
Mechanical Mining of Anthracite (with Discussion) H. D. Kynor
Advances in the Preparation of Anthracite (with Discussion) Dever C. Ashmead
Slush Problem in Anthracite Preparation (with Discussion) John Griffen
Anthracoal: A New Domestic and Metallurgical Fuel (with Discussion) Donald Markle
Power Installation at Coverdale Mine Charles M. Means
Automatic Substations Used in Coal Mining (with Discussion) R. J. Wensley
Electric Power a Factor in the Anthracite Field (with Discussion) W. A. Thomas
Determination of Electrical Equipment for a Mine Hoist (with Discussion) Graham Bright
The Lynch Plant of United States Coal and Coke Co. (with Discussion) H. N. Eavenson
Ashley Planes for Handling Freight Traffic (with Discussion) C. H. Stein
Application of Pulverized Coal to Boilers (with Discussion) J. W. Fuller
Capitalization of Mine Development (with Discussion) J. B. Dilworth

ABSTRACTS OF PAPERS PRESENTED IN DRILL STELL SESSIONS:

TITLE AUTHOR
Investigation of Fatigue of Metals under Stress H. F. Moore
The Ideal Drill Steel Frank H. Kingdon
Rock-drill Steel N. B. Hoffman
Drill Steel from Hollow Ingots P. A. E. Armstrong
Breakage and Heat Treatment of Rock-drill Steel A. E. Perkins
Drill-steel Sharpening Clarence M. Haight
Short Rock-drill Steels Reclaimed by Welding W. T. Ober

BIOGRAPHICAL NOTICES

TITLE AUTHOR
Hennen Jennings W. R. Ingalls
Irving A. Stearns R. V. Norris
Tsunashiro Wada M. Otogawa
Edmund Gybbon Spilsbury  
Benjamin Bowden Lawrence  
William B. Cogswell  
Stuart M. Buck  

INDEX

TITLE AUTHOR
Index