SPECIAL OFFER OF 



The Works of Hugo De Vries 



SPECIES AND VARIETIES, THEIR ORIGIN BY 



MUTATION. Edited by D. T. MacDougal $5.00 



PLANT-BREEDING. Comments on the Experiments 



of Nilsson and Burbank. Illustrated. Cloth, gilt 1.50 



THE MUTATION THEORY. Experiments and 

 Observations on the Origin of Species of the Vege- 

 table Kingdom. (2 vols.) Numerous illustrations, 

 colored plates. Translated by Prof. A. B. Farmer 

 and A. D. Darbishire. Cloth, per volume, $4.00 8.00 



INTRACELLULAR PANGENESIS. Including a 

 paper on Fertilization and Hybridization. Trans- 

 lated from the German by C. Stuart Gager. Clot h 3.00 



Total - - $17.50 



The five volumes sent prepaid for $10.00 



This special reduction is made to students of the Works of this great 

 Dutch Botanist DeVries. The offer is limited to a small remainder of 

 the present edition. Send for Complete Catalogue of 



THE OPEN COURT PUBLISHING CO. ch [ c on g d°on nd 



The One Best-- 



The New Nature Library 



To show how authoritative the New Nature Library is — when we 

 decided to add a book on Spiders we went to J. H. Comstock, the 

 authority in this country on this subject. For Insects in general, we 

 went to Dr. L. O. Howard, the noted government expert. For Reptiles 

 to Raymond L. Ditmars — -and so on for the seventeen subjects, of 

 which this great Library of Nature is comprised. It is an invaluable 

 cyclopedia for everyone whose interest or occupation is in any way 

 connected with Nature, and it is by far the most authorative and best 

 set of books of its kind that is published. 



We will be glad to send you a booklet giving full particulars about this 

 set of books. Fill out the enclosed blank and send it to us now. 



DOUBLEDAY, PAGE & COMPANY 

 Garden City, New York 



Please send me without obligation, your prospectus of THE NEW NATURE 

 LIBRARY, and your special selling plan. 



NAME 



ADDRESS 



Kindly mention The Nature-Study Review when replying to advertisements 



