Vol. 54.] SCHISTS OF THE ST. GOTHA.RD PASS. 373 



on the subject agreed that a great deal of the effect was due to this 

 agency. To this rule the present paper was no exception. 



Prof. Jtjbd also spoke. 



The Author expressed his thanks to the speakers for the recep- 

 tion which they had given to his paper, and stated that he did hold 

 the garnets to be original minerals, for they frequently occurred in 

 igneous rocks in cases where there was a local deficiency of alkaline 

 constituents. He by no means denied that pressure was an important 

 agent in producing mineral change, yet he thought that these and 

 many other rocks exhibited structures which could not be attributed 

 to it, but must be due to fluxional movement during cooling, if they 

 were not due to metamorphism of banded sediments. 



