«4 ■ 



PHYSIOLOGY OF FARM 

 ANIMALS 



<<(■-■'' BY 



T^'B^WOOD, C.B.E., M.A., F.R.S., 



^(.. ^ AND 



F^ nf A^'mARSHALL, ScD. 



PART I. GENERAL 



BY 



F. H. A. MARSHALL, Sc.D. 



FELLOW OF Christ's college, Cambridge 



AND reader in AGRICULTURAL PHYSIOLOGY 



CAMBRIDGE 



AT THE UNIVERSITY PRESS 



1920 



