458 0. D. von Engeln — Studies on Ice Structure. 



Fig. 6. 





Snow /ce 







fond /C£. 





Fig. 6. Ice cylinder of fig. 5 after second compression. Position arid 

 boundaries of different kinds of ice used in filling as marked. Note that 

 lines of juncture of different kinds of ice are nearly obliterated and that the 

 crystal ends bridge them. Outline of the old top of ice from first compres- 

 sion shown faintly under the snow ice, indicating transparency of latter. 

 Granules shown to be largest in glacial ice. 



