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The Works of Hu^o 

 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 

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 lated from the German by C. Stuart Gager. Cloth 3.00 



Total - - - - $17.50 

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This special reduction is made to students of 

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