Bacteria in Relation to Country Life 



By JACOB G. LIPMAN, M.P., Ph.D. $i. S o net 



11 A discussion of the problem of health and comfort in the country 

 as affected by these minute organisms which float in the air we 

 breathe and in the water we drink and perform an important work 

 in the soil from which our food is extracted." Review of Reviews. 



" Much space, almost a third of the book, is quite properly given 

 to the relation of bacteria to the soil and to the growth of plants. 

 This part of the subject is very interesting reading and shows 

 clearly how complex the problems of scientific farming have be- 

 come and how worthy of expensive experimentation. Scarcely less 

 interesting, although exceedingly brief, is the discussion of the 

 sewage problem." New York Evening Post. 



Diseases of Economic Plants 



By F. L. STEVENS, Ph.D. 



Professor of Botany and Vegetable Pathology of the North 

 Carolina College of Agriculture and Mechanic Arts, and 

 Biologist of the Agricultural Experiment Station, and 

 J. G. HALL, M.A. 



Assistant in Vegetable Pathology in the North Carolina 

 Agricultural Experiment Station 



Cloth, 513 pages, i2mo, $2.00 net 



This is designed as a text-book to meet the needs of that class of 

 students of our Agricultural Colleges and Agricultural High 

 Schools who wish to learn to recognize and treat plant diseases 

 without the burden of long study as to their causes. It indicates 

 the chief characteristics of the most destructive plant diseases of 

 the United States, caused by cryptogamic parasites, fungi, bacteria, 

 and slime moulds, and gives information regarding the best 

 methods of prevention or cure of these diseases. While, in the 

 main, non-parasitic diseases are not discussed, a few of the most 

 conspicuous of this class are briefly mentioned, as are also diseases 

 caused by the most common parasitic flowering plants. 



Text-book of Plant Diseases 



Caused by Cryptogamic Parasites 

 By GEORGE MASSEE 



London, Third Edition, 1907 Cloth, 458 pages, i2mo, $1.60 net 



PUBLISHED BY 



THE MACMILLAN COMPANY 



64-66 Fifth Avenue, New York 



