196 NATURE STUDY REVIEW [6:9— Sept., 1913 



arrangement, however, gives it a purposeful organization which 

 will make the material immensely more valuable to students of 

 domestic science. The fundamental scientific aspects of the 

 bacteria and of the chemical and physical processes associated 

 with them are adequately presented, with the possible exception 

 of the restricted discussion of the relation of bacteria to decay. 

 Twelve chapters given to the relation of bacteria to different 

 diseases include an excellent summary of the present state of our 

 knowledge of human diseases, and additional chapters summarize 

 our knowledge of the distribution of disease germs through water, 

 milk and other foods. An appendix which includes 40 illustra- 

 tions of different types of molds will make it possible for students 

 to identify most of the common fungi that they will encounter in 

 connection with bacteriological work. 



The book will serve excellently as a textbook in bacteriology 

 for general elementary courses in agricultural schools and schools 

 of domestic science. It is to be hoped that other branches of 

 science not now represented by such purposeful presentations of 

 their subject matter may rapidly be so organized. 



