260 Lieutenant R. Straehey on the 



since the marks were made the day before. The same pro- 

 cess was repeated at each of the other marks. 



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

 measured in exactly the same way. The results of these 

 measurements are as follow : — 



The motion in twenty-four hours of the several marks will 

 also be found to be — 



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 mo- 



