154 : The Philippine Journal of Science 
subject. Part II on methods of research also could be made 
into one or several volumes by Doctor Smith. 
Part III, a discussion of fourteen selected bacterial diseases, 
although intended primarily for the undergraduate student, con- 
tributes much that is valuable to pathologists in unknown fields, 
as an aid in diagnosis and general knowledge. Doctor Smith 
is not subject to the criticism applicable to many authors in that 
he has not confined the horizon of plant diseases to the District 
of Columbia, or the United States, or even North America. 
There is frequent mention of plant diseases in the Tropics and 
the oriental countries as well as in Europe, South America, and 
South Africa. 
Part IV contains extremely interesting chapters on the pro- 
duction of tumors in the absence of parasites and on experimental 
teratosis. Several of the reviewer’s associates in the medical 
sciences have been interested in these chapters. They are of 
great interest to all biologists. Part V is really the most im- 
portant of the book, containing some good honest fundamental 
advice on the presentation of results, ethics, and codperation. 
Many investigators in the Philippine Bureau of Science in fields 
of research other than plant pathology have read the chapters 
on these subjects and have appreciated the great stimulus con- 
veyed in these discussions. 
Few typographical errors are to be found; among those noted is 
the misspelling of Philippines (p. 694) and Phyllosticta (p. 59). 
The book is a contribution not only, as it was primarily in- 
tended, to the younger students of plant pathology, but to re- 
search men in all sciences. It is a valuable stimulus to a correct 
scientific attitude and many an investigator would do well in the 
rush of work to sit down for an hour and reread Part V of this 
book. With the publication of this book, we must, moreover, ac- 
-knowledge appreciation to Doctor Smith for his achievement 
almost unaided in building up and placing on a firm foundation 
a comparatively new science. 
H, A. L. 
