THE EUBBARD GLACIER, ALASKA 



293 



THE HUBBARD GLACIER, ALASKA 1 



By Professor LAWRENCE MARTIN 



UNIVERSITY OF WISCONSIN 



SOUTHEAST of Mt. St. Elias and the Malaspina Glacier, Alaska, 

 ^-} in the fiorded upper part of Yakutat Bay, known as Disenchant- 

 ment Bay, is the Hubbard Glacier. It is the largest ice tongue in this 

 region, except certain tributaries of the great Malaspina glacier. It 

 has a total known length of twenty-eight miles along the trunk glacier, 

 exclusive of one broad tributary whose lower twelve and one half miles 

 is all that man has ever seen, two other much narrower tributaries 

 each twelve miles long, five other branches each over five miles in length 

 and scores of smaller tributaries. This system of ice tongues (Fig. 1) 

 has, therefore, nearly one hundred miles of valley glaciers larger than 



Pig. 1. Map of Hubbard Glacier and its known tributaries. The main glacier 

 may rise at least twelve miles farther north, or over forty miles from the sea, while 

 the northwest tributaries may be even longer. 



1 Published by permission of the Director of the U. S. Geological Survey. 

 These observations are based upon ( 1 ) a U. S. Geological Survey expedition in 

 1905 under Professor R. S. Tarr, to which the writer was attached, his expenses 

 being met by a grant of the American Geographical Society of New York, and 

 (2) upon the National Geographic Society's Alaskan expedition of 1909, in 

 charge of Professor Tarr and the writer. The illustrations are from photographs 

 by A. J. Brabazon, of the Canadian Boundary Survey, Oscar von Engeln and 

 the author. 



