EDITOR'S ANNOUNCEMENT 



The rapidly increasing specialization makes it im- 

 possible for one author to cover satisfactorily tlie whole 

 field of modern Biology. This situation, which exists in 

 all the sciences, has induced English authors to issue 

 series of monographs in Biochemistry, Physiology, and 

 Physics. A number of American biologists have decided 

 to provide the same opportunity for the study of 

 Experimental Biology. 



Biology, which not long ago was purely descriptive 

 and speculative, has begun to adopt the methods of the 

 exact sciences, recognizing that for permanent progress 

 not only experiments are required but that the experi- 

 ments should be of a quantitative character. It will be 

 the purpose of this series of monographs to emphasize 

 and further as much as possible this development of 

 Biology. 



Experimental Biology and General Physiology are one 

 and the same science, by method as well as by contents, 

 since both aim at explaining life from the physico-chemical 

 constitution of living matter. The series of monographs 

 on Experimental Biology will therefore include the field 

 of traditional General Physiology. 



Jacqxtes Loeb, 



T. H. MOBGAN, 



W. J. V. OSTEEHOXJT. 



