GLACIOLOGY OF THE SOUTH ORKNEYS. 



847 



day following that on which those figured and described above were seen, in order 

 to photograph them, it was found that as a result of the strong sun which had been 



Text-fig. 8. —Glacier grains. 



i 



Text-fig. 9.— Lines of glacier grains seen under the sole of a glacier. 

 Disturbed where a boundary is embedded in the ice. Arrow 

 marks direction of flow. 



shining on the ice-face, the surface had become translucent white and granular, 

 instead of being a clear transparent blue as before, and the well-defined grain outlines 

 were only to be seen in the shade underneath the sole. 



TRANS. ROY. SCO. EDIN., VOL. XLIX., PART IV. (NO. 15). 115 



