H. E. Woodman 159 



The percentage of etlier extract i.s uot as large as would be expected 

 from a study of the figures obtained for the organic acids in the silage 

 extract. The difference is not wholly accounted for by the fact that a 

 portion of the acids must exist in combination with bases, and it seems 

 to indicate the occurrence in the silage of substances of an acidic nature 

 which are not extracted by ether. Evidence that this might be the case 

 was obtained during the titration of the extract with N/IO alkali. As 

 the neutrality point was approached, a yellow colour developed in the 

 originally almost water-clear solution. This point is being investigated 

 further. 



Protein digestibility corrected for metabolic nitrogen. 



Sheep I Sheep II 



Protein consumed, gm. 102-78 102-78 



Pepsin-insoluble protein voided, gm. 16-80 16-79 



Protein digested, gm 85-98 8.5-99 



Corrected digestion coetticient, % ... 83-66 8.S-66 



Mean corrected digestion coefficient % 83-7 



As in the other two trials, there is little fault to find with the agree- 

 ment shown by the two sets of coefficients. 



Table XVI. Percentages of digestible nutrients in the oat 

 and tare silage sample {calculated to dry matter). 



0/ 

 /O 



Crude protein ... ... 8-17 



Ether extract 3-17 



Nitrogen-free extractives 32-13 



Crude Bbre 16-81 



Ash 3-55 



Production starch equivalent (KeUner) per 100 lbs. dry silage = 45-59. 



Table XVII. Nitrogen balance during period 

 and weights of sheep. 



Both sheep lost weight in this period, but no conclusions can be 

 drawn from this as to the relative feeding values of hay and silage. The 



