Kaolin Incriistatioii on Fyrolasite. 365 



I wish to express my sincere thanks to Professor Orme 

 Masson for his constant help and advice throucfhout this inves- 

 tigation. 



I am also indebted to Mr. D. J. Mahony, for undertaking: the 

 mineralo^fical examination of the specimen, and to Mr. H. J. 

 Grayson, not only for the sections he has prepared, but for the 

 micro-photographs illustrating the text. 



DESCRIPTION OF PLATE XXlY. 



Fig. 1. — Powder consisting of Kaolin and Quartz, before 

 separation. 

 2. — Quartz-free Kaolin, 

 (cir. 12 x). 



