786 



R OLLIN D. SA LI SB UR V 



fact that the more solid veins composing it were thicker, and the 

 less solid ones thinner, than in the troughs which lay beside them. 



I 



*ie 



^^ 



Fig. 12. — Diagrams showing how the overhangs, such as shown in Fig. ii, are 

 interrupted laterally. The lines represent overhangs, and the interruptions represent 

 the disappearance of ihe overhangs. 



Fig. 13.— Diagram showing transverse profile of a small portion of the surface 

 of the westernmost glacier on the north side of Herbert Island. 



'(((I 



11/ 



II 



In some places these vertical ribbings on 

 the surface were far from straight. Occasion- 

 ally, as on one of the glaciers on Herbert 

 Island, they were distinctly wavy, as shown in 

 Fig. 14. In two cases the vertical veining 

 was seen at the ends of glaciers, where their 

 faces were vertical. In these sections the but- 

 cropping edges of the veins were .not straight 

 in a vertical sense. Indeed they were some- 

 times sharply flexed. 



Vertical veins transverse to the axis of the 

 glacier, and therefore at right angles to the 

 series just described, were seen in several 

 places. They affect some glaciers where the 

 longitudinal set is wanting, and some where it 

 is present. The two sets of vertical veins 

 may be in different portions of the same gla- 

 cier, or they may affect the same part. Where 



seen, the longritudinal veins were thinner than the transverse, 



and more continuously present. 



Fig. 14. — Diagram 

 showing the wavy or 

 sinuous course of the 

 outcropping edge of 

 longitudinal vertical 

 laminae. Same gla- 

 cier as Fig. 13. 



