408 THE SEQUENCE OP LAVAS AT >*OBTH HEAD. [Dec. 1914- 



for greater clearness than would the attempt to describe it under 

 one of the older terms, which otherwise tend to lose their definite 

 meaning. With regard to the suggested connexion between the 

 lavas of intermediate chemical composition and an original essexite- 

 magma, he enquired as to the sense in which the term essexite 

 was used by the Author. 



Br. H. Lapwobth, in reply, read portions of the paper, and 

 answered, as far as he was able to do so in the Author's absence,, 

 the many questions raised. 







