Chairman, Steering Committee and Section of Geology and 

 Geography; Athelstan F. Spilhaus, University of Minnesota, 

 Chairman, Section of Meteorology; William C. Steere, Stanford 

 University, Chairman, Section of Botany; and particularly, 

 A. L. Washburn, Chairman of the General Meeting of the Con- 

 ference and Executive Director of the Arctic Institute of North 

 America, who conceived the idea of the present volume and 

 made possible its publication. 



Henry B. Collins 



IV 



