THE VARIATION OF GLACIERS. IV 22$ 



the bay have coalesced and advanced nearly two miles [0. K, 

 Klotz) . 



Dr. William H. Dall, who visited the bay for the United 

 States Coast Survey, in 1874, thinks that these glaciers were 

 certainly a mile or more shorter then than the Canadian map 

 shows them to be now ; so that the advance seems to be still 

 progressing. 



Mexico. — The glacier on Mount Iztaccihuatl is advancing 

 (Ez Ordonez). 



Harry Fielding Reid. 

 Geological Laboratory, 

 Johns Hopkins University, 

 March 27, 1899. 



