140 GLACIOLOGY 



A number of these ice blocks could be sunk at intervals at such localities by 

 means of an iron weight suspended below the block, and well insulated from it by a 

 short piece of asbestos rope. The ice blocks could be suspended by steel piano wire, 

 again insulated from the ice blocks by a short piece of asbestos rope, and the upper 

 end of the piano wire could be attached to the base of the Barrier ice-cliff in one of 

 the inlets, or preferably to old bay ice in a secure and sheltered spot in these inlets. 



An approximate estimate of the cross-sections of the ice streams of the western 

 side of the Koss Sea region from just south of the Beardmore Glacier to the Reeves 

 Glacier at Mount Nansen may be made as follows : — 



Of the Coastal Mountains shown on the section, the total length of which is 

 about 750 miles, about 113 miles are occupied by well-developed glaciers, and of 

 this width no less than nearly 100 miles is made up of outlet glaciers. 



These widths have been based on the following approximate measurements : — 



Glaciers marked thus (*) are "Alpine" or "Norwegian" tj'pes of glaciers. The rest are outlet 

 glaciers. 



It is possible that in the case of the glaciers entering the "inlets" in the above 

 list the width of the inlet may be greater than that of the glacier which fills it with 

 ice. The margin of error for the estimated widths of all the glaciers is considerable. 

 For example, instead of 113 miles, their total width may not aggregate more than 

 about 97 miles. It is assumed in the calculations which follow that the approxi- 

 mate total width of such of these glaciers as are termed outlet glaciers is about 100 

 miles. 



If the exact cross-section of the ends of these glaciers were known, as well as 

 their average speed of movement throughout the year, one would be in a position 



