<m Entomologists in Canada. J801 



22. Grant, Francis, Orillia, C. W. Coleoptera and Lepidoptera. 



23. Hill, Rev. Geo. S. J., M. A., Markham, County of York, C. W. 

 Coleoptera and Diptera. 



24. HiscKS, Rev. William, F. L. S., Prof, of Nat. Hist. University Col- 

 lege, Toronto. Studies all orders ; b-.t does not collect. 



25. HuBBERT, James, Knox's College, Toronto, and (during Vacations) 



Grafton, County of Northumberland, C. W. Diptera, Neuroptera, 

 andj to some extent, Coleoptera. 



26. Kreighoff, C, Quebec. Insects of all orders ; pays particular atten' 

 iion to Lepidoptera {Heterocera, and Coleoptera. 



27. Lawford, J. M., Toronto. Lepidoptera and Coleoptera. 



28. Lawrason, W. L., Dundas Street, London, C. W. Lepidoptera and 



Coleoptera. 



29. Morris, Beverley R., M.D. Institution for the Deaf and Dumb, and 

 the Blind ; 490 Queen street, Toronto. Ml orders ; hut chiefly Cole- 

 optera and Lepidoptera. 



30. Provancher, Rev. L., St. Joachim, Montmorency, C. E. All orders 

 except Apt era ; pays especial attention to Lepidoptera and Coleoptera. 



31. Reed, E. Baynes, London, C. W. Coleoptera and Lepidoptera. 



32. Reynolds, T., Financial Director, Great Western Railway, Hamil- 

 ton, C. W. Lepidoptera. 



33. RooKE, Capt. W. S., Scots Fusilier Guards, Montreal. Coleoptera 

 and Diurnal Lepidoptera. 



34. Saunders, William, Dundas Street, London, C. W. Ml orders; 

 chiefly Coleoptera and Lepidoptera. 



35. Tcrton, F., Simcoe Street, London, C. W. All orders ; chiefly Cole- 

 optera and Lepidoptera. 



36. Rogers, Robt. V., Jr., St. James' Parsonage, Kingston. 



ARTICLE XX.^Onthe Chemistry of (he Far th. ByT.STERRT 

 HuKT, M. A., F.R.S. ; of the Geological Survey of Canada. 



Extract of a letter to Elie de Beaumont, published in the Comptes Rendu* 

 of the French Academy of Sciences, June 9th. 1862. 



On the 28th of October, 1844, a memoir was deposited with 

 the Academy by the illustrious Cordier. Being in a sealed packet, 

 its contents remained unknown until after liis death, when at the 

 request of his widow, the seal was broken, and the paper, which 

 bears the date of October 22, 1844, was first made public; in the 

 Comptes Remlus of the Academy for February 17, 1862. In this 

 remarkable memoir, wliicli has for its title "On the origin of the 

 calcareous rocks which do not belong to the primordial crust," 

 (De Vorigine des roches calcaires, etc.,) the author givos his 

 views upon the formation of limestone and dolomite. He rejects 

 Von Buch's theory of dolomitization, wuich still finds some sup- 



