SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE SHERZER. 



PLATE XXIII. 



FIG. i. Drainage brook from Wenkchemna Glacier, August, 11)04. Free from sediment 



and having a summer temperature of 35 to 36 F. 

 No. 2. No. 3. 



No. 5. 



FIG. 2. General view of eastern end of Wenkchemna Glacier, August, 1904. Looking southward. The very complete 

 covering of rock debris and irregular surface are well shown. 



