Volume 74
Containing Papers and Discussions Presented at Meetings Held in Salt Lake City, Utah, September, 1925; Petroleum Division, Casper, Wyo., August, 1925; New York, February, 1926; and Pittsburg, October, 1926

Title Page

Preface

Contents

Officers and Directors

Technical Committees

PROCEEDINGS OF MEETINGS

MEETING	DATE
Pittsburgh Meeting	October, 1926
Petroleum Development and Technology in 1925 (Contents)

PAPERS:

Mining Geology

TITLE	AUTHOR
Electrical and Electromagnetic Prospecting (with Discussion)	Hans Lundberg
Relations of Metalliferous Lode Systems to Igneous Intrusives	W.H. Emmons
Magmas, Dikes and Veins (with Discussion)	Waldemar Lindgren
Geology and Utilization of Tennessee Phosphate Rock	Richard W. Smith
Notes on the Geology of East Tintic (with Discussion)	G.W. Crane
Iron Fields of the Iron Springs and Pinto Mining Districts, Iron County, Utah	Duncan MacVichie
Ore Deposition and Enrichment at the Magma Mine, Superior, Arizona (with Discussion)	M.N. Short and I.A. Ettlinger
Geology of the Yoquivo, Chihuahua, Mining District	C.W. Hall
Geology and Ore Deposits of the Asientos-Tepezala District, Aguascalientes, Mexico	G.E. Anderson
Geology of the Zaruma Gold District, Ecuador	Paul Billingsley

Mine Ventilation

TITLE	AUTHOR
Discussion of Theory of Mine Ventilation
Mine-air Flow (with Discussion)	G.E. McElroy
Application of Kutter's Formula to Gases (with Discussion)	F. Ernest Brackett
Economic Design of Mine Airways	A.S. Richardson
Permissible Limits of Toxic and Noxious Gases in Mine and Tunnel Ventilation (with Discussion)	R.R. Sayers
Holland Tunnel (Hudson River Vehicular Tunnel) (with Discussion)	Ole Singstad
Occurrence of Fire Damp in Bituminous Coal Mines	Frank Haas
Explosibility of Coal and Other Dusts in a Laboratory Steel Dust Gallery	V.C. Allison
State Coal-mining Laws Concerning Ventilation (with Discussion)	John A. Garcia

Coal

TITLE	AUTHOR
Report of Coal and Coke Committee, A. I. M. E. (with Discussion)
Evaluation of Coal (Discussion at New York Meeting, February, 1926, and at the Coke Conference, Pittsburgh, October, 1926)
Appraisal of Coal-property Values (with Discussion)	H.M. Chance
Relation of Ash Composition to the Uses of Coal (with Discussion)	A.C. Fieldner and W.A. Selvig
Relation of Origin and State of Carbonization of Coal to Problems of Low- temperature Carbonization (with Discussion)	S.W. Parr
Pittsburgh Coal Bed (with Discussion)	I.C. White, G.H. Ashley and J.A. Bownocker
Time Element in Control of Face Conditions in Coal Mining	H.F. McCullough
Experiments in Shot-filing with Low and High-Voltage Currents	A.C. Watts
Mining Methods in the Pittsburgh District. By the Pittsburgh District Sub- committee on Coal and Coke (with Discussion)
Nemacolin Mine of Buckeye Coal Co.	A.W. Hesse
Operation of Nemacolin Mine	W.Z. Price
Mt. Union Sand-flotation Plant for Preparing Bituminous Coal (with Discussion)	T.M. Chance
Pulverized Coal as Fuel for Copper-refining Furnaces	E.S. Bardwell and Roy H. Miller
Selection of Coals for the Manufacture of Coke (with Discussion)	H.J. Rose
X-Ray Studies of Coal and Coke (with Discussion)	Ancel St. John

Mining Methods

TITLE	AUTHOR
Mining Methods in Grass Valley District, California (with Discussion)	J.A. Fulton and A.B. Foote
Sharpening and Handling Drill Steels at Franklin (with Discussion)	C.M. Haight
Top Slicing in Old Fills at El Bordo Mine, Mexico (Discussion of paper by R. J. Mechin in Transactions 72, 1925)
Liquid Oxygen as an Explosive (with Discussion)	Frederick W. O’Neil and Herman Van Fleet

Ground Movement and Subsidence

TITLE	AUTHOR
Report of Sub-committee on Coal Mining to Committee on Ground Movement and Subsidence (with Discussion)
Subsidence Around a Salt Well (with Discussion)	C.M. Young
Factors Affecting Bank Slopes in Steam-shovel Operations (with Discussion)	Louis S. Cates

Petroleum

TITLE	AUTHOR
Problems of Pumping Deep Wells	Lester C. Uren
Influence of Submergence on the Efficiency of the Oil fell Plunger Pump (Summary)	Lester C. Uren, V.J. Collins and S.B. Sargent
Mining Petroleum in France and Germany	G.S. Rice and J.A. Davis
Technologic Progress in the Oil Industry	F. Julius Fohs
Factors Affecting the Cracking of Petroleum	Charles Parmelee
Basic Changes in Refining Processes	Walter Miller
Comparative Value as Motor Fuel of Cracked Gasoline VB Straight Run Gasoline (Summary)	A.E. Wells
Review of American Production (Summary; with Discussion)	F. Julius Fohs

INDEX

TITLE	AUTHOR
Index