Vol, 65.] GEOLOGICAL FEATURES OF CARPALLA CHINA-CLAY PIT. 161 



Dublin mountains and in Fiji perfectly white china-clay occurred 

 beneath the turf or other vegetation, and passed downwards into 

 granite by an insensible gradation. The one process was by no means 

 exclusive of the other. 



The Author thanked the Fellows for their general acceptance of 

 his geological conclusions. The details of the problem of kaoliniza- 

 tion which had been brought forward by several speakers would 

 form a tempting subject for a chemical dissertation, but one too 

 wide to be dealt with adequately on that occasion: He would, 

 however, remark that, although there were in this region positive 

 evidences in abundance of the operation of vapours containing 

 fluorine, boron, and in a less degree of chlorine, there were no such 

 evidences of the operation of carbonic acid ; while, therefore, he 

 did not deny its agency, he could find no ground for affirming it, 

 carbonates being remarkable by their absence. 



Q. J. G. S, No. 258. 



