EDITORS' ANNOUNCEMENT 



The rapid increase of specialization makes it im- 

 possil^le for one author to cover satisfactorily the whole 

 field of modern Biology. This situation, which exists ia 

 all the sciences, has induced English authors to issue 

 series of monographs ia Biochemistry, Physiology and 

 Physics. A nimxber 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 quantitative experi- 

 ments. It wdll be the purpose of this series of monographs 

 to emphasize and further as much as possible this develop- 

 ment of Biology. 



Experimental Biology and General Physiology are one 

 and the same science, in method as well as content, 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 traditionsd General Physiology. 



Jacques Loeb, 

 t. h. moegan, 

 w. j. v. osteehout. 



