Volume 119
Coal Division 1936 Papers and Discussions Presented before the Davison at the Meeting Held at State College, PA., October 19-20, 1934; St. Louis MO., October 28-29, 1935; New York, February 18-21, 1935 and February 17-21, 1936

Title Page

Contents

Foreword

Institute Officers And Directors

Coal Division Officers And Committees

Underground Mining

TITLE	AUTHOR
Bumps in Coal Mines-Theories of Causes and Suggested Means of Prevention or of Minimizing Effects (With Discussion)	George S. Rice
Method of Eliminating Coal Bumps or Minimizing Their Effects	J. F. Bryson
Subsidence at Merrittstown Air Shaft near Brownsville, Pa. (With Discussion)	F. W. Newhall and L. N. Plein
Prevalence of Anthraco-silicosis among Hard-coal Mining Employees	R. R. Sawyers and Roy R. Jones
Trend in Underground Lighting (With Discussion)	Graham Bright
Recording of Roof Subsidence (With Discussion)	H. Landssberg

Beneficiation and Utilization

TITLE	AUTHOR
Importance of Pulp Density, Particle Size and Food Regulation in Flotation of Coal (With Discussion)	John T. Crawford
Performance Expectancy of Domestic Underfeed Stokers for Anthracite (With Discussion)	Allen J. Johnson
Principles of Fuel Beds	P. Nicholls
Future of Coal for Stationary Power (With Discussion)	E. H. Tenney
Relation of Steam-generating Equipment to Preparation, Selection and Burning of Bituminous Coal (With Discussion)	E. G. Bailey

Research and Classification

TITLE	AUTHOR
Variables in Coal Sampling (With Discussion)	J. B. Morrow and C. P. Proctor
Fusain Content of Coal Dust from an Illinois Dedusting Plant (With Discussion)	Gilbert Thiessen
Need for Coal Research (With Discussion)	H. H. Lowry
Mechanism of Combustion of Coal (With Discussion)	Martin A. Mayers
Concentration of the Banded Ingredients of Illinois Coals by Screen Sizing and Washing	L. C. McCabe
Investigation of Procedure for Determination of Coal Grind ability by the Ball-mill method (With Discussion)	C. G. Black
Further Investigation of Methods for Estimating the Grind ability of Coal (With Discussion)	H. F. Yancey and M. R. Greer

Economics

TITLE	AUTHOR
Regulation of the Coal Industry (With Discussion)	Howard N. Eavenson
Economic and Competitive Position of Illinois Coal	Walter H. Voskuil
Economics of the Distribution of Anthracite (With Discussion)	Norman F. Patton

MiscelIaneous

TITLE	AUTHOR
Flow of Gas through Coal (With Discussion)	S. P. Burke and V. F. Parry
Conserving Health of Employees in the Coal Industry	Fred A. Krafft
Prospecting for Anthracite by the Earth-resistivity Method (With Discussion)	Maurice Ewing, A. P. Craby, J. W. Peoples and J. A. Peoples, Jr.
Pennsylvanian Coals of the Southeastern Margin of the Western Interior Province	C. M. Young

INDEX

TITLE	AUTHOR
Index