SCIE 
Se 
Fripay, Frsruary 16, 1912 
CONTENTS 
The Glaciers and Glaciation of Alaska: PrRo- 
FESSOR RALPH S. TARR .............---+ 241 
Professor George Davidson: PRoFESSOR Ru- 
iniaahal TS}, EKOMANE oop Hooded Oud bODCOddORD 258 
Museum Extension Work in Chicago ....... 261 
The American Museum of Natural History .. 262 
Scientific Notes and News 
University and Educational News .......... 
Discussion and Correspondence :— 
Professor Jennings as a Biological Philos- 
opher: PRoFEsSsoR WM. E. Ritter. The 
Chestnut Tree Disease: MARSDEN MANSON. 
An Unusual Effect of a Lightning Dis- 
charge: Proressor A. H. PURDUE. 
of the Term 
BATHER 
Misuse 
““Genotype’’?: Dr. F. A. 
267 
Scientific Books :— 
Kellogg’s The Animals and Man: Pro- 
FEssor M. F. GuyER. Books on Aeronau- 
Dr. W. J. HumpHreys. Banks on 
Philippine Silk Culture: L. O. H. ....... 
tics: 
270 
Spectal Articles :— 
Dr. Husert LyMAN 
CuaRK. Biology of Miastor and Oligarces: 
Dr. HE, P. FELT. 
ceolaria: PROFESSOR GEo. F. ATKINSON, 
Rost. SHORE 
Fossil Holothurians: 
Spurred Flowers in Cal- 
MSS. intended for publication and books, ete., intended for 
review should be sent to the Editor of ScieENcE, Garrison-on- 
Hudson, N. Y. 
oak ae 
THE GLACIERS AND GLACIATION OF 
ALASKA? 
INTRODUCTION 
NOTWITHSTANDING the great area of 
Alaska, the ruggedness and inaccessibility 
of a large part of the glaciated region, and 
the briefness of the period of exploration, 
we are already in possession of a large 
body of fact with regard to the glaciers 
and glaciation of our northern territory. 
The researches of Wright,? Russell,’ Reid,* 
Gilbert,> Davidson,® Dall’ and _ others 
have given us much valuable information 
concerning the coastal region; and the 
many expeditions by Hayes,® Brooks, and 
various other members of the United 
States Geological Survey® have added ma- 
+ Presidential address before the Association of 
American Geographers, at the Washington meet- 
ing, December 29, 1911. 
* Wright, G. F., ‘‘The Ice Age in North Amer- 
ica,’’? New York, 1891, chapter III., pp. 36-66. 
* Russell, I. C., ‘‘An Expedition to Mount St. 
Elias, Alaska,’’ Nat. Geog. Mag., Vol. 3, 1891, 
pp. 53-203; ‘‘Second Expedition to Mount St. 
Elias,’’ Thirteenth Ann. Rept. U. S. Geol. Survey, 
pt. 2, 1892, pp. 1-91. 
*Reid, H. F., ‘‘Studies of Muir Glacier, 
Alaska,’’ Nat. Geog. Mag., Vol. 4, 1892, pp. 19- 
84; ‘‘Glacier Bay and its Glaciers,’’ Sixteenth 
Ann. Rept. U. S. Geol. Survey, pt. 1, 1894-95, 
pp. 415-461. i 
5Gilbert, G. K., ‘‘Glaciers and Glaciation,’’ 
Harriman Alaska Expedition, Vol. IIT., New York, 
1904. 
*Davidson, G., ‘‘The Glaciers of Alaska,’’ 
Trans. and Proc. Geog. Soc. Pacific, Vol. IIL., 
Ser. II., June, 1904, 98 pp. 
"Dall, W. H., U. S. Coast Pilot, Pacific Coast, 
Part I., Alaska, 1883, Washington, D. C. 
8<““ An Expedition through the Yukon District,’’ 
Nat. Geog. Mag., Vol. 4, 1892, pp. 117-159. 
® Mainly published in annual reports, bulletins 
and professional papers of the U. S. Geological 
Survey. 
