6o 



NUTRITION OF FARM ANIMALS 



which forms the " cracklings " when the fat is melted out as in 

 making lard or tallow. 



It is evident that the composition of adipose tissue must 

 vary according to the extent to which the deposition of fat in the 

 cells has been carried. When the cells are enlarged and well 

 filled with fat, as in the fattened animal, the percentage of fat 

 will be high and that of protein, water and ash correspondingly 

 low. When there has been little deposition of fat, or when fat 

 previously present has been withdrawn by starvation, the fat 

 content will be low and the percentage of protein, water and 

 ash will be high. The following figures reported by Beythien for 

 the extremes of composition of the adipose tissue of commercial 

 beef, pork and mutton serve to give a general idea of the com- 

 position of such deposits in well-fed animals. 



TABLE 14. RANGE OF COMPOSITION OF ADIPOSE TISSUE OF COMMERCIAL 



MEAT 



As an illustration of the variations in the composition of 

 adipose tissue in different regions of the body the following 

 average figures found by Henneberg, Kern and Wattenberg for 

 the composition of the fat tissues of five lambs may be pre- 

 sented. 



TABLE 15. COMPOSITION OF ADIPOSE TISSUE OF DIFFERENT REGIONS 



