THE QUARTERLY REVIEW OF BIOLOGY 



view "simply means scientific natural 

 history." This attitude towards the sub- 

 ject is in refreshing contrast to that of 

 some American workers in this field, who, 

 in their zeal to be up-to-date and strictly 

 in the mode, appear to regard ecology as a 

 branch of physics. Mr. Elton discusses 

 the subject under the following heads: 

 The distribution of animal communities; 

 ecological succession; environmental fac- 

 tors; the animal community; parasites; 

 time and animal communities; the 

 numbers of animals; variations in the 

 numbers of animals; dispersal; ecological 

 methods; ecology and evolution. There 

 is a bibliography of 152. titles on the 

 general subject, and a number of specific 

 references to systematic works on British 

 animals. Altogether this is a valuable 

 contribution to the literature of general 

 biology. 



Professor Julian Huxley contributes an 

 introduction. 



LEBEN. ALTERN. TOD. 



By E. Korschelt, S. Hirsch, F. W. Harms, 



M. Hartmann and H. Driesch. 



Hugo Bermuhler 

 z.50 marks Berlin-Lichterfelde 



7 x 10; 81 (paper) 

 A collection of five lectures, by the 

 authors named, given in Frankfurt in 

 192.5-2.6. Prof. Korschelt deals with 

 duration of life in animals and plants; 

 Dr. Hirsch with the phenomenon of 

 senescence and death; Dr. Harms with 

 rejuvenation and the prolongation of 

 life; Dr. Hartmann with death, reproduc- 

 tion and rejuvenation, with special refer- 

 ence to the protozoa; and finally Prof. 

 Driesch with life, death and immortality. 

 The treatment is in all cases popular in 

 style. There is no index. 



HIPPOKRATES. Line Auslese seiner Ge- 

 danken uber den gesunden und kranken Menschen 

 und uber die Heilkunst, 



By Arnold Sack. Julius Springer 



4.50 marks Berlin 



5 1 x 8|; 87 (paper) 

 A selection of quotations from the 

 writings of Hippocrates, translated into 

 German and assembled under 2.9 heads. 

 The choice of material is excellent. 

 While primarily intended for medical 

 students, the general biologist will find 

 much of interest in the book, and except 

 in such a form he is not likely to read 

 Hippocrates at all. 



LIVING CREATURES. Studies of Animal 

 and Plant Life. 



By C. von Wyss. A. and C. Black, Ltd. 



izs. 6d. net London 



5^x 8|;xi + 406 

 An excellent "nature study" book, by 

 a successful teacher of "Natural History 

 in the wide sense. ' ' There are Z7 chapters, 

 of which zi deal with common animal 

 forms, chiefly insects, while the remaining 

 chapters are devoted to plant topics. 

 The book is well written; and, as Prof. 

 J. Arthur Thomson says in his Foreword, 

 "gives us glimpses of the Drama of Life." 

 There is an index. 



EXPERIMENTAL EMBRYOLOGY. 

 By Thomas H. Morgan. 



Columbia University Press 



$7.50 5 1 x 9I; xi -f- 766 New York 



In a later number of The Quarterly 



Review ov Biology this important volume 



will receive extended notice. 



