1913] The Ottawa Naturalist 135 



graduates to engage in original research at the Biological Stations, 

 future volumes of memoirs, not inferior to this, may be looked 

 for in future years. 



S< ience Fellowships from our Royal Society, or Government 

 Science Scholarships, would induce our best and most brilliant 

 students to resort to the Biological Stations, which are un- 

 equalled in the world in providing splendid facilities for valuable 

 research. 



C. 



Sea-Fisheries of Eastern Canada.- The Commission of 

 Conservation has just issued a report on the "Sea-Fisheries of 

 Eastern Canada" that is of more than passing interest to all 

 who are interested in the fisheries of Canada. The volume, 

 which is bound in cloth and illustrated in colours, consists of a 

 report of the proceedings of the Committee of the Commission 

 on Fisheries, Game and Fur-bearing animals, which was held in 

 Ottawa on June 4th and 5th last. At this meeting a number 

 of experts delivered addresses on different subjects relating to 

 fisheries, and these were thoroughly discussed by the members 

 of the Committee. 



The following is a list of the addresses which the report 

 contains: 



Chairman's Address, by Dr. C. C. Jones; Whitefish of the 

 Great Lakes, by M. J. Patton, M.A. ; Conservation of the Oyster, 

 by Joseph Stafford, M.A., Ph.D. ; The Lobster Fishery of Canada, 

 by W. A. Found; Oyster Fishery of Prince Edward Island, by 

 Hon. J. A. Matheson, K.C. ; Needs of the Fisheries of Nova 

 Scotia, by Dr. Howard Murray; Sea- Fisheries of Eastern Canada, 

 by J. J. Cowie; The Shad Fishery of Canada, by E. E. 

 Prince, LL.D.; Fish Culture in Canada, by W. A. Found. 



The appendices contain a number of useful statistical tables 

 respecting fisheries, especially whitefish and shad. 



KILLING FROSTS. 



Every plant has its own particular freezing temperature 

 by which it is killed. In all cases it must be at least 2 C. 

 (3. 6 F.) below T the freezing point of water (32 F.) 



The experiments of Rein show that the critical killing 

 temperature for Musa ensete is 2. 10 C. (28. 2 F.); for Begonia, 

 2.26C. (27. 9 F.); for Tulip, 3 C. (26. 6F.); leaf-stem of 

 Laurel, 3. 5 C. (25. 7 F.); of the Olive-tree, 4. 1 C. (24. 6 F.); 

 of the Oleander, 5 C. (23. OF.); of Celandine, 6. 99 C. 

 (19. 4 F.); of the Daisv. 7.9C. (17.8F.); of the Violet, 



