FOODS — ANIMAL PRODUCTION. 



879 



The relative proportion of the different parts of the carcass to the 

 entire dressed animal, weighing on an average, 144.6 pounds (the head, 

 leaf lard and kidneys being removed), was as follows: Meat (fat and 

 lean), 88.62 per cent; bones (less marrow). 6.28 per cent; skin, 4.67 per 

 cent; marrow, 0.12 percent; spinal cord, 0.08 percent; tendons, 0.16 

 per cent, and hoofs, 0.08 per cent. 



The analytical data are discussed in detail. 



" In regard to the details of the various constituents, it is seen that the Berkshire 

 leads all the others in the percentage of water, namely, 43.10. The smallest percent- 

 age of water is in one of the Duroc Jerseys, namely, 30.31. The largest percentage 

 of fat is found in a Duroc Jersey, namely, 57.68, and the smallest in the Berkshire, 

 namely, 40.46. Of the total nitrogenous suhstauces, the largest quantity is found in 

 the Berkshire, namely, 13.02, and the smallest iu a Duroc Jersey, namely, 8.96. It is 

 evident tli at the meat of the Berkshire is better for the production of muscular strength, 

 while that of the Duroc Jersey is best suited for the production of animal heat. These 

 remarks are made without any expression of opinion concerning the type as a whole, 

 but only on the data obtained from the 2 animals. The examination of a large num- 

 ber of typical animals of each of the breeds would be necessary to establish a definite 

 rule of that kind. It is fair to presume, however, that the single animalis to a certain 

 extent typical, and therefore represents to that extent racial characteristics." 



Digestion experiments, J. M. Bartlett (Maine Sta. Bpt. 1897, pp. 

 141-158, pis. 1). — Experiments to determine the digestibility of mixed 

 silage from mature flint corn, sunflower heads, and horse beans; corn, 

 sunflowers (whole plant), and horse beans; Sauford corn; hay, mostly 

 timothy; corn meal, and skimmed milk, were made with 3 sheep. The 

 usual methods were followed. The feeding periods were of 12 days' 

 duration, the first 7 days being regarded as preliminary. The com- 

 position of the feeding stuffs used is reported. When corn meal or 

 skimmed milk was fed with hay, the coefficients of digestibility were 

 calculated, taking into account the values found when timothy hay was 

 fed alone. In connection with the digestion experiments, the heat of 

 combustion of the feeding stuffs and feces was determined with a bomb 

 calorimeter. Taking into account the fuel value of the food, feces, and 

 urea, the available fuel value of the rations was calculated. A summary 

 of the digestion experiments follows: 



Coefficient* of digestibility. 



