SEPTEMBER, 1909 



VOL. XXIU, No. 6 



fTHE 



OTTAWA 

 N ATURA LIST 



Published by The Ottawa Field-Naturalists' Club. 



EOftor: 



ARTflUR GIBSON, 

 Central Experimental Farm, 

 OTTAWA. 



?l06octatc BDltors: 



Dr. H. M. Ami, Geology. Prof. E. E. Prince, W. T. Macoun, Botany. 



Dr. J. F. Whiteaves, ^ P l7r,.To "" ^'^' J- W. Gibson. M.A. 



Paleontology. ^^"^ ' "" ' ^''^'Smithology . Nature Study. 



Hon. F. R. Latchford, W. H. Harrington, A. McNeill, Meteorology. 

 Conchology. Entomology. 



CONTENTS: 



Certain Biological Principles and their Practical Application in 

 the Improvement of the Field Crops of Canada. By L. H. 



Newman, B.S.A. - - - -.--'- - 105 



Field Notes of Canadian Botany. I. By Edward L. Greene. - 110 



The Prairie Warbler in Northern Ontario and other Notes. By 



G. Eifrig - _ . _ _ - - - -11,^ 



A Remarkable Migration of Yellow Bellied Sapsuckers. Bv 



A. B. Klugh - - - - - - - - '- 115 



The Rapid Extermination of the Bald Eagle. By W. E. Saunders 116 



Book Review ---------- 117 



Obituary : Joseph Frederick Whiteaves ----- J. 18. 



Copeland-Chatterson-Crain Limited /0^^^";C3i'^0 ^\ 



ISSUED SEPTEMBER 28. 1909. / Q^ 



Untertd at the Ottawa Post Office as second claat matter. /Uj/, 10^40^1 ^ 



t^)>M^Sf 



