MR CADELL ON EXPERIMENTAL RESEARCHES IN MOUNTAIN BUILDING. 345 



brittle consistency, evidently prove that (1) horizontal pressure applied at one end of 

 the section does not throw the mass into folds from end to end, but only influences the 



Fig. 9. 



Fie. 10. 



Fig. 11. 



strata a short distance in advance of the compressing surface ; (2) the pressure prefers 

 to find relief in a series of gently inclined thrust-planes, whose direction of inclination 



VOL. XXXV. PAET 7. 3 L 



