528 
SUMMARY OF CURRENT RESEARCHES. 
The contents of the book are divided into chapters dealing with 
the biology of bacteria — bacteria in water, soil and air ; the relation of 
bacteria to fermentation, to disease, and their presence in and effect on 
food-staffs. There is also an interesting account of immunity and 
antitoxins, and some remarks on disinfection. 
Though the author disclaims all pretension to originality, it must 
not be supposed that the material is out of date ; indeed, some parts are 
almost novelties, such as the description of the disposal and treatment 
of sewage. For those who desire a readable and trustworthy guide as 
to the merits and mischiefs of bacteria, Dr. Newman’s work is eminently 
suited. 
