part 3] METAMOKPHISM IN THE MOJSA COMPLEX. 351 



paper added new facts of importance, some of which confirmed, 

 while others were opposed to. conclusions at which the Author had 

 arrived, and thus he appeared as the critic of his own work ; 

 certainly, no more competent critic could be found. 



The Author said that attention had been called to the great 

 amount of work, especially experimental work, which remained to 

 be done before we could reach a satisfactory general view of the 

 genesis of the crystalline schists. Might not good results be 

 obtained by the use of crystallizable salts which are amenable to 

 change under laboratory conditions ? In the fascinating subject 

 of the tectonics and metamorphism of these rocks, investigators 

 must be prepared to abandon many an attractive theory, confident, 

 however, that the sounder one which takes its place will prove yet 

 more attractive and more stimulating. 



