160 



MANUAL OF CATTLE-FEEDING. 



Date. 



Food. 



Urea pti day 

 Grms 



September 24 



Bread, milk, and water. 



Same -r 15 grms. glycocol. 

 it i( (( 



Bread, milk, and water. 



U t€ ii 



u a li 



3.960 



*' 25 



" 26 



8.768 



7.187 



'* 27 



9.470 



" 28 



3 810 



" 29 



3.780 



The feeding of glycocol on tlie 25th and 26th caused 

 a marked increase in the excretion of xn*ea on the 26th 

 and 27th5 showing beyond a doubt that glycocol is con- 

 verted into nrea. No glycocol was found in the urine. 



The average excretion of urea on the days preceding the 

 glycocol feeding was 3.S2S5 grammes per day. 



Total urea on 26th and 27tli 16. 657 grms. 



Urea of two average days 7 657 ** 



Excess caused by 30 grms. glycocol. 9 000 *' 

 Urea equivalent to'' ** " 11.970 ** 



Difference , 2970 *' =248peroent. 



It will be seen that nearly 25 per cent, of the glycocol 

 fed is unaccounted for. The authors state that the glyco- 

 col was not absolutely dry and pure, but it is difficult to 

 imagine that so large an error could be thus caused. 



It seems more reasonable to suppose that under the in- 

 fluence of the glycocol a gain of flesh took place, and this 

 supposition is perhaps supported by the fact that the in- 

 crease in the excretion of urea does not appear till the sec- 

 ond day. It would seem as if a gain of flesh took place at 

 first, and that subsequently the protein consumption in- 

 creased, to fall again when the glycocol was withdrawn. 



