112 REVIEW. 



generation is usually clear and good. The chapter on Manifesta- 

 tions of Life includes a discussion of the responses of animals 

 and plants to various stimuli which is for the most part correct 

 and clear. It might have been better to have made more man- 

 ifest the distinction between nerve force and electricity. The 

 paragraph in which distinction between motion and locomotion 

 is set forth, while not important in itself, is one which illustrates 

 the author's faculty of clear and illuminating expression. The 

 section on metabolism is very good, especially its treatment of 

 "foods" and the integration of living substance. It is unfor- 

 tunate that in a book of this general character, cell division 

 has not been treated in a broader manner. 



The chapter on the higher organisms is probably the one most 

 open to criticism by zoologists. However, it should be remem- 

 bered that a discussion of animal morphology, limited to 60 

 pages, is more difficult to write than a text-book of several 

 times that length. The chapter on parasitism will be found 

 extremely useful, and, if properly used in conjunction with 

 laboratory work, should give the student a thorough grasp of 

 this difficult but fascinating subject. The discussion of blood 

 relationship is not as extensive as one would expect to find, 

 but is sufficient if properly supplemented by the teacher. The 

 chapter on infection and immunity affords a discussion of this 

 subject which should go far to prepare students who are ex- 

 pecting to study medicine to understand this work in bacteriology 

 and pathology, and give the work in bacteriology more biological 

 meaning than is frequently the case. The text is not one which 

 can be used to advantage, with even a fairly advanced class, 

 unless the teacher is prepared to supplement it very largely with 

 both lectures and experimental work and with additional read- 

 ings; but, if used in the right way, it should prove a distinct 

 advance on the texts in general biology which are now available. 



Lawrence E. Griffin. 



