162 
Journal of Mycology 
[Vol. 8 
barberry, barley, bean, beet (and all other commonly cultivated 
plants), the entries cover about 4 pages. After each the disease 
or the fungus in question is given, thus : Alfalfa, leaf spot fungus ; 
Asparagus, rust; Tomato, fusarium, etc. There is also a complete 
index to technical [botanical] names. These Reports, though con¬ 
taining no account of extended research along mycological lines, 
nevertheless record numerous observations of the occurrence of 
parasitic fungi, experiments for checking their ravages, and 
voluminous compilations as to the character and life histories as 
well as their economic aspects. Amateurs, beginners and even 
specialists will therefore find the Ohio publications a useful ency¬ 
clopedia of plant diseases. 
Text Book on Bacteriology.—The Laboratory Guide 
in Elementary Bacteriology by William Dodge Frost (pub¬ 
lished by the author, Madison, Wisconsin) is a book in demand 
as shown by the appearance after one year of a second, but slightly 
changed edition. The secret of its success is doubtless centered 
in the fact that it is essentially the work that the author has been 
using in his classes. Part I, General Bacteriology, occupies 133 
pages; Part II, Medical Bacteriology, covers pages 134-348. 
The actual use of this book will doubtless show its thorough 
practicability, satisfactory completeness and excellent character 
which are evident to the reviewer; it is therefore most highly 
commended to all interested in practical bacteriology. 
Apple Scab is the title of an important Bulletin (No. 67, 
pp. 109-156, Illinois Agricultural Experiment Station, Decem¬ 
ber 1901) by George P. Clinton. A general account is given of 
the fungus including its parasitic or temporary stage on leaves 
and fruit, Fusicladium dendriticum; and its saprophytic or per¬ 
manent stage, Venturia, on the dead leaves. The connection of 
the former with the latter, — suggested by Goethe in 1887, fig¬ 
ured by Brefeld in 1891, and fully studied (the scabs of Apple, 
Pear, and Cherry) in 1894 by Aderhold who connected them 
with species of Venturias, — was corroborated by Mr. Clinton; 
the latter’s work however was successful, it should be said, while 
he was yet ignorant of the investigations by the other botanists 
named. He says, “From the results of these and the writer’s in¬ 
vestigations there is no doubt that apple scab is merely a para¬ 
sitic summer stage of a permanent saprophytic fungus occurring 
on the fallen leaves. It also appears to be this latter form that 
is largely (in its immature condition) responsible for carrying 
the fungus through the winter. At least the writer has been 
unable to find any satisfactory evidence that the scab stage persists 
on the young twigs, as has been stated by some investigators, 
and by means of a new crop of scab spores in the spring spreads 
the disease to the young fruit and leaves. Neither was there 
found any evidence that the old spores lived over the winter on 
