1 832.] Proceeding of Scientific Societies. 



10. Remarks on the Structure of the present Comet. C. H. F. Peters 



11. On a method of studying the laws of Contrast quantitatively. O. 



12. On the Heat of the Comstock lode. G. F. Becker, by invitation, 



13. Topographical effects ,,f Faults and Landslides. G. F. Becker, b; 



14. Prepartion of Cyanin from Chinoline. C. F. Chandler. 



23. On the physical c 



24. Effect of Magnet 



25. On Sinapic acid. 



32. On the supposed H 



Ontario Entomological Society. — A meeting of this society- 

 was held recently in Montreal during the session of the A. A. 

 A. S. After the transaction of the routine business, the presi- 

 dent, Mr. Wm. Saunders, of London, Ontario, delivered his an- 

 nual address, in which he referred to the general prevalence of 

 the Hessian fly in the province of Ontario, during the past sea- 

 son, inflicting a loss on the agricultural community estimate*! at 

 several hundred thousand dollars, and called attention also to the 

 relative abundance of parasites among the insects now maturing. 

 The Phylloxera was referred to, and the discovery of the root- 

 inhabiting type injuring the vines in several portions of the 

 province, a form of the insect which until within the past few 

 weeks was not known to occur within the province. Several 

 other interesting points were taken up in reference to the occur- 

 rence of some rare insects and new habits acquired by others. 

 The short first crop in Ontario, a result, by many, attributed to 

 insect agency, was shown to be due to other causes, some refer- 

 ence was also made to the recent dissemination of insects destruc- 

 tive to fruit in California, and the energetic measures being 

 adopted there to suppress them. 



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