379 
The Study of Plant Diseases. 
is indispensable ; it is available in the form of an English trans¬ 
lation. 1 For those who wish to read a more philosophical treatment 
of plant pathology Marshall Ward’s book entitled “ Disease in 
Plants” (London, 1901) can be recommended. 
Massee’s “ Text Book of Plant Diseases ” has long been a useful 
book on the subject for English students although it is not so full 
as some of the works mentioned above. This book, however, has 
now been superseded by the issue of a larger work, “ Diseases of 
Cultivated Plants and Trees” 2 from the pen of the same writer. 
The introductory chapters of this book are devoted to a consideration 
of Epidemics, Dispersal of Spores, Fungicides aud other subjects of 
practical interest. The succeeding chapters deal with the life- 
histories of the disease-producing organisms, and suggestions are 
made as to measures of control. An important feature of the work 
is the lists of references to original papers which are given 
immediately after the descriptions of the fungi. 
Another recent book on the same subject is by Professor 
Duggar, an American mycologist. This book, called “ Fungous 
Diseases of Plants ” 3 has been issued in an extremely convenient 
form. The illustrations are remarkably good, and the subject 
matter is written in a clear, terse, style. Another welcome feature 
of this work is the attention paid in it to culture methods and to 
the means of performing infection experiments. Of course the book 
has been written from the standpoint of American plant diseases, so 
that some diseases of importance in this country are omitted. 
Fuller information on the subject of bacterial diseases of plants is 
given in it than in other books on plant pathology. In reference to 
literature on the subject of bacterial diseases of plants mention 
should be made of Erwin F. Smith’s manual entitled “ Bacteria in 
relation to Plant Diseases.” 4 The first part of this work dealing 
with culture methods has alone appeared as yet, and plant patho¬ 
logists will eagerly look forward to the second part which will deal 
in detail with specific bacterial diseases. F.T.B. 
1 Hartig, R. “Text-book of the Diseases of Trees.” Revised 
•and edited by H. Marshall Ward, London, 1894. 
2 Duckworth & Co., London, 1910. 
3 Ginn & Co., Boston, New York, Chicago and London, 1909. 
4 Carnegie Institution, Washington, 1905. 
