214 | Tue Microscope, 
tographs. More complete and conclusive studies were made of a 
disease of the silk-worm, which was apparently that known as 
jaundice. Of especial interest is the fact that he was able to pro- 
duce this disease in cabbage-worms by moistening their food with 
culture-fluids containing the bacteria of this disease derived from 
silk-worms. These experiments seem to us to be of the highest 
importance. If this or some other bacterium could be used against 
the cotton-worm, how much more effectual it might be than the 
poisons which are now used. These are liable to be washed away 
by the first rain and will not multiply themselves. Prof. Forbes 
also reports at length on a disease attacking two species of datana 
in his breeding cages. This disease he is positive is the well-known 
flacherie of the silk-worm.—Science. 
BOOK REVIEWS. 
TRANSACTIONS OF THE MicHiGAN State MepicaL SocleTy— 
Twenty-First ANNUAL Mretinc.—We have in the present volume 
a work creditable to the society it represents, and their committee 
on publication. 
The arrangement of the contents is convenient, and especially 
satisfactory is the plan of placing the discussion immediately after 
the paper to which it relates. A matter for regret is that discussion 
of papers is not more general. The discussion is often of more 
value than the paper itself. The typographical execution and 
proof reading of the transactions are beyond criticism. A. 
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