A Bird Book for Children 



BIRD WORLD 



By J. H. STICKNEY 

 Assisted by RALPH HOFFMANN 



With color pictures and other illus- 

 trations by Ernest Thompson Seton 

 and L. A. Fuertes. 



List Price. 60 cents 



Descriptions of the habits, the homes, 

 the songs and the plumage of the 

 familiar birds of North America. 



GINN & COMPANY, Publishers 



Boston New York Chicago London 



The Wilson Bulletin 



Is a quarterly journal devoted to 

 the study of the birds as we find 

 them in the fields and woods. 



It is particularly concerned about the study 

 of the whole life-history of each species, 

 and about the effects of advancing civiliza- 

 tion upon the lives of all birds. It urges 

 the great importance of making a census 

 of our bird population for the purpose 

 of determining accurately what change 

 there may be in numbers due to changing 

 conditions. It is the official organ of the 

 Wilson Ornithological Club, which num- 

 bers among its members some of the 

 most prominent American ornithologists. 

 Carefully selected illustrations appear in 

 each numljer. 



15 cents a number; 50 cents a year 



Address 



LYNDS JONES, Editor, Oberlin. Ohio. 



J. HOflACd MCFAhLAND CO., MT 



Baisch&Lomb-Zeiss 



Convertible Protar 



Series VII A 



is the lens par excellence for 

 the naturalist photographer 



It is not only ;i doublet 

 of moderate focal length 

 but also one or two single 

 long-focus lenses accord- 

 ing as the doublet is com- 

 posed of lenses of similar 

 or dissimilar foci. 



Send for Descriptive Circular 



''PRISM'' 



IS A Little Magazine 

 we publish monthly. Not 

 a mere advertisement, but 

 a beautifully made and 

 printed little publication 

 about that world of won- 

 der and beauty seen by 

 the lens. Send us your 

 name and we will enter 

 your subscription FREE. 



Bausch & Lomb Optical Co. 



ROCHESTER, -V. Y. 



Mew York Boston Washinetoii 



ChicJKO San Francisco 



PlE«S«NT press, HAilHISSUiG, PA. 



