NOVEMBER, 1910 



VOL. KXIV, No. 8 



THE 



OTTAWA 

 NATURALIST 



Published by The Ottawa Field-Naturalists' Club. 



BOitOt: 



ARTHUR GIBSON, 



Central Experimental Farm, 



OTTAWA. 



?l09ociatc BOitors: 



W. T. Macoun, W. J. Wilson, Ph.B. Rev. G. Eifrig, 



Botany. Geology. Ornithology. 



Rev. G.W. Taylor, M.A. Alex. McNeill, L. M.Lambe, F.G.S., 



Conchology. Meteorology. P aloe ontology. 



W. H. Harrington, J. W. Gibson, M.A. Prof. E. E. Prince, 



Entomology. Nature Study. Zoology, 



CONTENTS: 



On Two New Trilobites from the Chazy River near Ottawa. By 



Percy E. Raymond. -------- 129 



Notes on the White-Throated Sparrow. By L. McI. Terrill. - 135 



Field Notes of Canadian Botany. II. By Edward L. Greene. - 138 



A Colony of Cliff Swallows and Others. By Norman Criddle. - 143 



Nesting of the American Osprey. By W. J. Brown. - - - 145 



Fall Excursion to Experimental Farm, ----- 146 



Notes : Clay Nodules ; Nest of Wilson's Snipe ; A simple Method of 



Water Purification, _.-_---- 147 



Copeland-Chatterson-Crain Limited /T^ /O _^ \Jl^Vk^ 



IISSUED NOVEMBER 5. 1910. / / _ O^' 



[^ I LIBRA"*' 



altered at the Ottawa Post Office as second clas* mattef.^ I - .^ i 



