Proceedings. i8i 



Ordinary Meeting, February loth, 1891. 



James Bottomley, B.A., D.Sc, F.C.S., Vice-President, 



in the Chair. 



The thanks of the members were voted to the donors 

 of the books upon the table. 



Mr. C. E. DE Range, F.G.S., called attention to some 

 deep borings recently made through the keuper marls, in 

 which the cores were remarkably variegated, in some 

 instances being divided by a layer of gypsum, the 

 marls being green on one side of the gypsum and red on 

 the other. It was suggested that on one side of the gypsum 

 the iron had been dissolved out and carried away, leaving 

 the colour green, while the gypsum prevented the same 

 action on the other side. The formation of the gypsum in 

 this and other cases was discussed by Mr. W. Brogkbank, 

 Mr. P. F. Kendall, and Mr. H. Grimshaw. 



Mr. Faraday called attention to the fact that an 

 opinion expressed in a paper read before the Society early 

 in 1884, that the phenomena of protective vaccination and 

 non-recurrent disease must be interpreted as due to a 

 vaccine educational influence, developing resisting vigour 

 in the living cells of the body attacked, is now the apparently 

 accepted doctrine, in preference to the old idea of the 

 invading microbe using up some material only rarely 

 elaborated. 



Mr. Pergy F. Kendall^ read a paper " On the source 

 of some remarkable boulders in the Isle of Man," and 

 exhibited specimens of a peculiar blue hornblende rock, 

 found scattered as travelled blocks all over the Isle of Man, 

 and identified by him with the rock of Ailsa Craig. 



