66 BOTANICAL GAZETTE [JULY 
first part on methods and technic. The field represented by this part has been 
so greatly enriched in recent times, by the addition of both facts and ideas, that 
the treatment seems wholly inadequate. 
rt, making up the bulk of the work, deals individually with the 
plant diseases induced by fungi, under which the author includes the myxomycetes 
and bacteria. The arrangement is in the order of taxonomic sequence, each 
the chapters. A section is given to the discussion of each disease, except those of 
minor importance, which are grouped together. The arrangement serves to bring 
out the morphological relations of the disease-producing fungi, without laying too 
much stress on purely morphological and taxonomic features. Some clearness 
would have been gained if the discussion of orders and families had not been 
forced into the system under headings coordinate with those under which the 
individual diseases are discussed. The treatment of the diseases is clear and 
comprehensive, each being discussed with reference to its distribution, the influ- 
_ ence of environmental factors on its occurrence and prevalence, the life history 
of its causal organism, and the methods of its control. In the relative prominence 
given to the various diseases, the author has been guided by their economic impor- 
tance, but the scope has been made broad enough to include all of the common _ 
diseases injurious to cultivated crops. A few diseases not occurring in this country 
have been included, apparently for the sake of completeness. As a rule, the text 
is conservative and free from innovations at variance with current usage. There 
is one notable exception, however, in the introduction of a series of newly com- 
pounded terms to apply to certain artificial groups of the rusts, based on the num- 
ber of spore-forms present in the cycle. Thus we have ‘“‘euautouredo” to include 
all autoecious rusts possessing all spore-forms, and “‘opsiautouredo” to include 
all autoecious rusts lacking the uredo stage, etc. Aside from any criticism that 
may be offered on account of the faulty composition of these unwieldy terms, a 
the pedagogical soundness of introducing them for the first time through the 
edium of a textbook may well be questioned. 
In matters of detail, the work shows an unusual lack of care in the preparation 
of the manuscript or in proofreading. The following examples serve as illus- 
trations: on page 54 ‘“‘Léwitz” is printed for ““Léwit”; on page 86 “Scot” for — 
“Scott”; and on page 121, second citation, “Histology” for “History.” In 
the legend of fig. 50 a germinating oospore is described as a ‘‘germinating 00g0- 
nium.” On pages 272 and 276 “Von ScHRENK” should read “‘ Von SCHRENE 
and SPAULDING.” On page 337 the citation of MCALPINE should read ‘“‘Stone-_ 
fruit trees” instead of “Stone fruits.” Phoma Betae is said not to occur in the 
United States - 344), bu but it = heet Feported from Colorado and Kansas. 
page 386, no | the terms “‘pycnium, aecium, — 
3 OrTON, W. A., Plant diseases in 1907. Yearbook Dept. Agr. 1907:577-589i 
see also Yearbook 1906:502 (Phyllosticta Betae Oud.). 
