Number 11- November 1949

Cover

Preface to Bulletin Eleven

Article [p. 3-7]
Origin of Caves
Ralph W. Stone

Article [p. 8-10, 16]
Hydrologic Investigation of Caves
Dan K Hamilton

Article [p. 11-16]
Speleology in Southeastern Alaska
Robert J. Hackman

Article [p. 17-23]
The Formation of Saltpetre in Caves
Burton Faust

Obituary [p. 23]
George A. White

Article [p. 24-26]
Saltpeter Mining in American Caves
George F. Jackson

Article [p. 28-30]
Cave Sickness
W.R. Halliday

Article [p. 30]
If You Find a Banded Bat

Article [p. 31-34]
Some Unusual Formation in Skyline Caverns, VA
E.P. Henderson

Article [p. 34-35]
Features of Cave Breakdown
William E. Davies

Article [p. 36]
A Report on Some Fluorescein Tests at Starnes' Cave
Joe Lawrence

Article [p. 37-41]
Safety Procedures in Speleological Exploration
John Dyas Parker

Article [p. 42-44]
The Cave Rescue Organisation of Yorkshire, England
Norman Thornber

Article [p. 44-45]
The Origin of the Markings in Pig Hole
John W. Murray

Article [p. 45-50]
A Picture Story of Schoolhouse Cave

Article [p. 51-54]
Mineralogical Data in Speleological Work
William J. Foster

Article
A Preliminary Study of Cave Ecology - with Special Reference to Tennessee Caverns
Thomas C. Barr Jr.

Article [p. 60-63, 72]
Caves in Eastern Canada
Harold B. Hitchock

Article [p. 64-68]
A Stormwater Cavern - In the Lost River Region of Orange County, Indiana
Clyde A. Malott

Speleological Abstracts [p. 68-71]
Edward F. Moore and E.L. Krinitzsky

Authors

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Abstracts were not provided for any articles in this year except "A Preliminary Study of Cave Ecology - with Special Reference to Tennessee Caverns."