AGRICULTURAL EXPERIMENT STATION. 



73 



(5) The percentage composition of the edible portions of the 

 carcass. 



(6) The relative amounts of edible material. 



It must be borne in mind in this discussion that Steer 1 must be 

 compared with Steer 4, and Steer 2 with Steer 3. 



(1) The relative iceights of organs and parts. Eeference to Table 

 shows no marked differences in the relative weights of the different 

 organs and parts. 



The proportion of carcass weight, for instance, varies but little in 

 the four animals, as is shown below. 





1 i 



T 55 



u O 



o . 

 .2 <s 



02 ft 



1^ 



. <S 



55? 



02 ft 



CO d 



. <u 

 55? 



m ** 

 r/2 ft 



-* a 

 . o 

 55" 



02 ft 



Proportion of carcass in body minus the skin and 



57.7 

 75.2 



57.0 

 73.1 



57.2 



75.9 



59.0 



74. S 







A glance at the weights of the different organs reveals no evi- 

 dence that the larger protein supply caused a more vigorous develop- 

 ment of any one of them, neither does it appear that the greater- 

 carbohydrate supply increased the quantities of intestinal or kidney 

 fats. 



(2) Composition of the fresh organs and parts. The figures of Tables 

 XXXVIII to XLII show that the composition of the various organs 

 and parts of the four steers' bodies was somewhat variable, but there 

 are no differences in this respect which can logically be attributed to 

 the food. The great variation in the water content in the heart is 

 accounted for in part by the greater or less amounts of fat and other 

 attachments which were ground up with that organ. In the case of the 

 lungs there appears to be no reasonable explanation of the g-reatly 

 different percentage composition. The figures hint at an error, but 

 a careful examination of the original data does not reveal any. 



(3) Percentage composition of the entire bodies, exclusive of skin 

 and contents of stomach and intestines. In Tables XXXIX to XLII are 

 calculated the total quantities of protein, fat and ash in the bodies of 

 the several animals, the skin and contents of stomachs and intestines 

 being ignored. Having these figures and knowing the weig - hts of 

 all the parts in the fresh condition, it is possible to compute the 

 percentage composition of the bodies of the animals as they existed 

 before being killed. This has been done and the results appear in 

 Table XLIII. There certainly is a striking similarity in the com- 

 position of the bodies of the steers of the same age. It is very notice- 

 able that the older steers contain a less proportion of water and pro- 

 tein and a larger proportion of fat,but when we compare Steer 1 with 

 Steer 4, and Steer 2 with 3, the differences are not important, and 



