Book Reviews 



Birds in their Relation to Man. By C. M. Weed and N. Dearborn. 

 J . B . Lippincott Co . , 1 9 1 6 . Second edition , revised . 



Teachers will learn with pleasure that by a new edition this 

 valuable work will continue to make it available to them. This 

 was the first book to summarize the extensive results of American 

 students showing the relation of birds to man and to put the results 

 in a form readily accessible to the general public. 



There are seven general chapters which discuss the following 

 subjects: methods of studying the food of birds, the history of 

 economic ornithology in America, the vegetable and animal 

 food of birds, the amount of food consumed, birds as regulators of 

 insect outbreaks, and the relation of birds to predaceous and 

 parasitic insects. Thirteen chapters are devoted to the detailed 

 consideration of birds by systematic groups. The four concluding 

 chapters discuss the conservation of game and non-game birds, 

 the prevention of injury by birds and the methods of attracting 

 birds. The appendix contains a valuable chapter on the legal 

 phases of bird protection, and a very valuable bibliography of the 

 economic relations of birds. There are only a few changes from 

 the earlier edition. The book should be in a large number of school 

 libraries, particularly in schools where agriculture is emphasized, 

 and in the city schools where the pupils need to learn the place of 

 birds in man's economy. 



Chas. C. Adams. 



Review on Senescence and Rejuvenscence. By Charles Manning 

 Child. Pp. xi & 481, University of Chicago Press, University 

 of Chicago. $4.00. 

 The book is a discussion of the indications and causes of old age 

 and of the renewal of youth which may be accomplished experi- 

 mentally in many of the animals. Chapter I is a discussion of the 

 various theories of the organism. The author believes in a physico- 

 chemical explanation of life phenomena. Chapter II discusses 

 in general terms the life cycle of animals. Chapter III states the 

 problem which he is attacking and gives the methods of investiga- 

 tion. 



"The real problem before us is then that of finding a general basis for these 

 phenomena which is applicable to all cases, not merely to those in which the 

 organism manifestly grows old, reproduces, and dies, but also to those in 



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