August 12, 1910] 



SCIENCE 



221 



shales, bogheads, etc. Evidence against algal 

 hypothesis as accounting for special characters. 



Remarks by David White. 

 The Regional Devolatilization of Coal: David 



White, Washington, D. C. 



Regional progressive devolatilization, which 

 marks the second (dynamo-chemical) stage of 

 coal formation, is due in most areas to deep- 

 seated horizontal thrust pressure long continued. 

 Essentially it is regional metamorphism, coal be- 

 ing a most sensitive index. Effects of loading and 

 faulting. Comparison of effects of intrusives. 



Discussed by J. F. Kemp. 

 Present and Future of Natural Gas Fields in the 



Northern Appalachians: F. G. Clapp, Pitts- 

 burgh, Pa. 



The waning natural-gas supply in some fields 

 brings up the question as to the future of the 

 natural-gas business. We must admit that the 

 outlook is in some ways discouraging, but never- 

 theless the predominant indications are that new 

 wells and new fields will continue to be found and 

 to be productive for many years yet. During the 

 past year there has been improvement and increase 

 in the business and in the area of the productive 

 fields in Pennsylvania and West Virginia. That 

 the companies are not discouraged is evidenced 

 by the fact that during 1909 the mains of the 

 principal producers have been greatly extended. 

 Cincinnati is now supplied, with every prospect 

 that in another year Baltimore, Altoona and pos- 

 sibly Washington will have natural-gas mains. 

 This paper described several new fields of interest, 

 and their relation to the geological structure is 

 summarized. Most of the shallow sand fields ex- 

 hausted years ago have been recently replaced by 

 adjacent new fields in deeper sands. In all cases 

 yet examined by the writer, these fields bear a 

 constant relation geologically to each other and 

 to the structure. 



Discussed by J. F. Kemp and F. R. Van Horn. 



The following papers were presented by title: 

 Tide Water Glaciers of Prince William Sound and 



Kenai Peninsula, Alaska: U. S. Gbant, Evans- 

 ton, 111. 

 Eolation Vnder the Stimulus of Aridity : Chakles 



R. Reyes, Des Moines, Iowa. 

 Glacial Lakes and Channels near Syracuse: T. C. 



HoPKiKS, Syracuse, N. Y. 

 Glacial Investigations in the Lake Superior Re- 

 gion in 1909: Fkakk Levebett, Ann Arbor, 

 Mich. 

 Coon Butte; and Meteoritio Falls of the Desert: 

 Chaeles R. Keyes, Des Moines, Iowa. 



Bird's Hill, an Esker near Winnipeg, Manitoba: 

 Wabeen Upham, St. Paul, Minn. 



The Bed Sandstones of Southeastern Minnesota: 

 C. W. Hall, Minneapolis, Minn. 



The Magothy Formation of the Atlantic Coast: 

 A. B. BiBBiNS, Baltimore, Md. 



Discovery of Fossils in the Quantico Slate Belt, 

 and the Association of Volcano-sedimentary 

 Beds with the Slates of the Virginia Crystalline 

 Region: Thomas L. Watson, University of 

 Virginia, and S. L. Powell, Salem, Virginia. 



Pleistocene PJienomena of Central Massachusetts: 

 W. C. Alden, Washington, D. C. 



Revision of Paleozoic Systems, II.: E. 0. Uleich, 

 Washington, D. C. 



Evidence that the Fossiliferous Gravel and Sand 

 Beds of Iowa and Nebraska are Aftonian: B. 

 Shimek, Iowa City, Iowa. 



Note on a Method in Teaching Optical Mineral- 

 ogy: F. W. McNaie. (Introduced by A. C. 

 Lane.) 



Pebbles: Types Formed by the Sea, Rivers, Wind 

 and Glaciers: F. P. Gullivee, Norwich, Coim. 



Rhode Island Coal: Chaeles W. Beown, Provi- 

 dence, R. I. 



Preglaoial Drainage of Central Western New 

 York: A. W. Gbabau, New York, N. Y. 



The Barite Deposits of Five Islands, N. 8.: 

 Chaeles H. Wabeen, Boston, Mass. 



Nelsonite, a Neiv Rock-type : Its Occurrence, Asso- 

 ciation and Composition: Thomas L. Watson 

 and Stephen Tabee, University of Virginia. 

 The following officers were elected for 1910: 

 President — ^Arnold Hague, Washington, D. C. 

 First Vice-President — Charles Schuchert, New 



Haven, Conn. 



Second Vice-President — A. P. Low, Ottawa, 



Canada. 



Secretary — Edmund Otis Hovey, New York, 



N. Y. 



Treasurer — William Bullock Clark, Baltimore, 



Md. 



Editor — J. Stanley-Brown, Cold Spring Harbor, 



N. Y. 



Librarian — H. P. Cushing, Cleveland, Ohio. 

 Councillors (1910-12) — J. B. Woodworth, Cam- 

 bridge, Mass., and C. S. Prosser, Columbus, Ohio. 

 Fellows elected December 28, 1909 — William 



Clinton Alden, Wallace Walter Atwood, Edson 



Sunderland Bastin, Edward Wilber Berry, Willis 



Stanley Blatchley, Henry Andrew Buehler, Fred 



Harvey Hall Calhoun, Arthur Louis Day, Frank 



Walbridge De Wolf, James Walter Goldthwait, 



