2 Proceedings. 



during the previous session, and published in the last 

 volume of its Memoirs and Proceedings. Diagrams of the 

 apparatus were exhibited and explained. Referring to the 

 authors' conclusion that chlorine and hydrogen are capable of 

 direct combination at a high temperature, Dr. BOTTOMLEY 

 pointed out that the experiments seemed to negative an 

 hypothesis which had lately been promulgated to the effect 

 that no two bodies combine except in the presence of a 

 third body — an electrolyte. 



Mr. P. Cameron read a paper entitled " Description of 

 a new genus of European Tenthredinidce and of some unde- 

 scribed Ckalcididce." 



A conversation on the possibility of holding injurious 

 insects in check by the introduction of such parasites ensued. 



