pTERE is one of the 

 most f as ci n a ti ng 

 nature books it has ever 

 been our good fortune 

 to publish : 



THE FROG BOOK 



By Mary C. Dicker son. 



Frogs and toads have been comparativelv neglected in 

 nature-study, but this book contains a wealth of original 

 observation and pioneer work that is a real contribution to 

 science. It is an ideal volume in the nature series we have 

 long been issuing — a work of reference which is authoritative 

 and complete, yet full of vital interest and readable as "nature 

 fiction." 



1 6 plates in color and nearly joo black and white photo- 

 graphs from life by the author. Net, $p.oo {Postage, poc). 



The easiest and pleasantest way to know the trees is 

 through 



THE TREE BOOK 



By yulia E. Rogers. 



" This is the most valuable, accurate and elaborate book 

 ever published in America on our native trees." — New York 

 Herald. 



The Jjo beautiful photographic illustrations show bud, 

 blossom, full leaf, fruit and wood of all the important species. 

 1 6 plates in color. Net, $p.oo [Postage, jpc.) 



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Doubledav. Page &Co. New York 



