THE 



COKRELATION AND CONSERVATION 



FOECES: 



PEOF. GEOYE, PKOF. HELMHOLTZ, DE. MAYEE, 



DE. FAKADAY, PEOF. LIEBIG AND 



DE. CAEPENTEK. 



INTKODTJCTION AND BEIEF BIOGEAPHICAL NOTICES OF THE 

 CHIEF PEOMOTER8 OF THE NEW VIEWS. 



BY 

 EDWARD L. YOUMANS, M. D. 



" The highest law in physical science which our faculties permit us to perceive the 

 Conservation of Force." DE. FABADAY. 



NEW YOEK: 

 D. APPLETON AND COMPANY, 



443 & 445 BROADWAY. 

 1865. 



LIBRARY OF THE 



US1YES8ITY c MIL 



OBSERVATORY, 



