262 NOTE ON A GLACIALLV-STRIATKD P'AVKMENT. 



The authors are very much indebted to Professor Sir Edgeworth David for 

 having made a trip to the site of the pavement, the result of his personal ob- 

 servations completely confirming their conclusions as to the glacial origin of the 

 phenomena. 



EXPLANATION OF PLATE XXIL 



Figs. 1 and 2. — Photographs of the upper exposure of ice-scratched pave- 

 ment. The little ledge a few inches high to the right of the hammer has also 

 been striated. The direction of the ice- movement has been from right to left 

 of the picture. 



Fig. 3. — Photograph of a rubbing of the upper exposure of the pavement. 

 The arrow indicating the direction of the ice-movement has been placed over 

 the position of the depre.-^sion from which the direction was determined. 



