GLACIERS OF THE CANADIAN ROCKIES AND SELKIRKS. 



31 



the pipe, however, marked the spot upon the ice over which it had stood, so 

 that its original position could be readih^ restored (see cross-section). It so 

 happened that the next ten days in the valley were cool and cloudy, with small 

 amounts of rain almost daily. This period was followed by ten days, and more, of 

 bright warm weather, with considerable surface melting. After each of these periods 

 the instrument was set in its former position and the original line again established, 

 but upon ice which had moved down into this position. Measurements were made 

 from this new line to the various plates and the amount of forward movement thus 

 detennined. The full data gathered from observations upon this set of plates 

 are shown in table v. The relative vertical position of the plates is shown in 

 the cross-section, as well as their relation to the surface features of the glacier. 



TABLE V. 



Observations upon the Series of Steel Plates. Set across the Victoria 



Glacier, July g, 1904. 



(Total Distance across Glacier along line of plates 2,167 fset.) 



In column 

 ig, from which 



7 is given the total forward movement for the cool period, July g to 

 the average daily movement can be seen at a glance by shifting 



