32 



PRINCIPLES OF FEEDING FARM ANIMALS 



The chemical composition of the increase depends hirgely 

 upon the proportion of growth to fattening, \yhpn \hc^ 

 inc rease is due principally to grovvjji, it consiats_i argely of 

 water and protein, together with a small amoun^ L o^ minprnl 

 n atter, \ yhen the increase is due principally to jattening^ 

 it cons ists largely of fat with only a small amount qf_\\^ater. 



Fig. 2. 



Porterhouse steak from a prime steer. Note the "marbliug." 

 (Illinois Experiment Station.) 



Thus an increase in_ili £ weight of a calL -imles ^ c d quite 

 lihrrnll}^^ is du e largely tQ-ja^-sto rage of p rotein_andjvvater 

 together wit h a rela tiyely small amount of fat. jOn , the, 

 o ther hand, the gain in weight of a two-ye ar-old steer is 

 d ue largely to a stora ge^^liaJL with only a relatiyely smal l 

 ^.mount of water and p r otein . This is brought out quite 

 clearly by the results of Waters, Mumford, and Trowbridge 

 at the Missouri Station.^ These inyestigators found that the 



1 Henry and Morrison, " Feeds and Feeding," p. 84. 



