Plant Physiology 



With Special Reference to Plant Production 

 By Dr. B. M. DUGGAR 



Cloth, ill., i2mo, $i.6o 



In this book the author discusses the life relations of 

 plants and crops from a fundamental point of view. 

 The important physiological activities of the plant are 

 demonstrated experimentally, and the practices of the 

 crop-grower are reviewed from this standpoint. Some 

 of the special topics that are considered are as follows : 

 The relation of the plant and the crop to water ; the 

 relation to soil nutrients, stimulants, and inhibiting 

 agents; the relation to hght and air; the relation to 

 heat and cold ; the relation to the disease environment. 



The Diseases of Tropical Plants 



By MELVILLE THURSTON COOK, Ph.D. 



Decorated cloth, ill., 8vo, $2.'/S 



This work calls attention to some of the most com- 

 mon, most widespread, and most destructive diseases of 

 tropical plants, as well as certain diseases of the tem- 

 perate zones not well known in the tropics. It gives a 

 practical knowledge of plant diseases in general and 

 their causes and the most common remedies and methods 

 of prevention. 



THE MACMILLAN COMPANY 



Publishers 64-66 Fifth Avenue New York 



