204 On the motion of the {Aug. 



of the glacier since the marks was made the day before. The same 

 process was repeated at each of the other marks. 



On the 25th May the progress of the fixed marks was again mea- 

 sured in exactly the same way. The results of these measurements are 

 as follows : 



Time of observa- 

 tion. 



h m 



21 May, 30 p.m. 



22 May, 1 15 p.m. 

 25 May, 8 45 a.m. J 



Distances of fixed marks from standard line. 



On the west 

 moraine. 





 ft. 

 

 1 



On the 



me- 



dial moraine 









ft. 



in. 



1 



ot 



2 



9$ 



At east foot 

 of medial 

 moraine. 





 ft. in. 



1 



2 llf 



Near the 

 middle of 

 the clear ice. 



On the east- 

 ern moraine. 







ft. in. 



1 0* 



3 1 







ft. in. 



6f 



1 H 



The motion in 24 hours of the several marks will also be found to 

 be— 







Mean motion of Ice in 24 hours, 



'in inches/ 





Date. 



On the 

 west mo- 

 raine. 



On the 



medial 



moraine. 



At east foot 

 of medial 

 moraine. 



Near the 

 middle of 

 the clear ice. 



On the 

 east mo- 

 raine. 



Approx. 

 mean Tem- 

 perature. 



21 to 22 May, 

 22—25 May, 



5.3 

 5.7 



11.9 

 7.6 



11.6 



8.4 



11.9 



8,8 



6.5 



3.8 



43oF. 

 38°F. 



General mean, 



5.5 



9.7 



10.0 



10.3 



5.1 





The progress of the lower extremity of the glacier was likewise 

 approximately measured by observing the apparent angular motion of a 

 pole fixed on the top of the eastern moraine, and of a conspicuous rock 

 lying not far from the middle of the glacier. 



The results of these observations are : 





Mean motion of Ice in 



24 hours, (in inches.) 



Date. 



On the moraine. 



Near middle of Glacier. 



19th to 20th May, 

 20th to 23rd May, 

 23rd to 25th May, 



3.0 

 6.2 

 5.3 



8.1 

 10.8 



General mean, 



4.8 



9.4 



