XIV. 



FOODS AND FEEDING 



297 



vertical lines ordinates between which the black column lies. The 

 scale is such that a black column reaching to the height of the line 

 1 Ib. of increase in live weight per 1000 Ib. per day, would represent 

 250 animals. The total number of animals referred to in the diagram 

 is 750. 







o 



9 o . ^ 



0-2 0-4 0-6 0-8 1-0 1-2 1-4 1-6 1-8 2-0 2-2 2-4 2-6 2-8 3-0 

 Albuminoids, in Ib., consumed per 1000 Ib. live-weight per day. 

 FIG. 8. Bullock-feeding experiments. 



It will be seen that when the amount of digestible albuminoid 

 supplied reaches about 1*0 to 1-2 Ib. per day, the increase in live weight 

 per day becomes practically a maximum and that additional albuminoids 

 produce no greater rate of increase. 



Fig. 9 shows the correlation between total non-albuminoids, ex- 

 pressed as starch, per 1000 Ib. live weight per day and increase in live 

 weight per 1000 Ib. per day. It will be seen that the daily gain 

 of live weight steadily increases with the increase in the daily supply 

 of non-albuminoids until the latter amounts to 15 or 16 Ib., after which 

 there is a diminution. This diagram is constructed on the same general 

 lines as Fig. 8, except that the spaces between the ordinates each re- 

 present 1 Ib. of non-albuminoids, whereas in Fig. 8 they each represent 

 0-2 Ib. of real albuminoids. 



Figs. 10 and 11 give summaries of the results obtained with over 

 2000 sheep of, at least, 100 Ib. live weight each. In this case, pounds 

 of food constituents per 100 Ib. live weight per week and increase in live 

 weight per 100 Ib. per week are the quantities plotted against each 

 other. The black vertical columns represent numbers of animals in 

 the respective sections, a height up to 1 Ib. increase in live weight, in 

 this case, representing 1000 animals. It will be seen that with sheep 

 a distinct correlation between digestible albuminoids consumed and 

 live weight increase can be traced, and that as Fig. 10 shows, a supply 



