72 EXPERIMENT STATION RECORD. 



gestible protein the addition of nonprotein fails to increase the production of 

 nitrogenous matter. 



" Recent experiments raise the question of the possibility of a direct utili- 

 zation of ammonia as a source of protein by the higher animals." 



It is stated that, while it appears that nonprotein may be of equal value with 

 protein for the maintenance of protein tissues of the body, it seems safe to con- 

 sider that ordinarily not enough of it is converted into protein to make it of ma- 

 terial significance for the production of milk protein and probably, therefore, of 

 protein tissue. Because of the complication of calculations which would be 

 brought about in the case of ruminants by introducing the nonprotein, it is. 

 suggested that it is wisest to continue, for the present, to use ordinarily the di- 

 gestible true protein as the basis of computing rations. To make the computa- 

 tion more accurate in the case of ruminants, however, a method is outlined 

 which consists in formulating separately the protein requirement for mainte- 

 nance and for productive purposes, computing a ration which shall supply suffi- 

 cient true protein to meet the requirement for production, and then computing 

 whether this ration contains sufiicient nonprotein to cover the maintenance re- 

 quirement. 



Alpine hays in the vales of Lanzo, E. Ruata (Ann. R. Acad. Agr. Torino, 

 53 {1910), pp. H5-M7). — Chemical analyses are reported of samples of hay 

 taken from different localities in the Piedmont. The relative proportion of 

 grasses and other plants in each sample was determined and their feeding value 

 is discussed. 



The feeding' value of apple pomace, J. B. Lindsey {Massachusetts Sta. Rpt. 

 1910, pt. 2, pp. 84-86). — A discussion of the feeding value of apple pomace, and 

 a brief report of a feeding trial with milch cows in which it was found that 

 from 15 to 30 lbs. per day per cow could be fed with satisfactory results. 



"In one case 2 cows were fed alternately, 4 weeks at a time, on grain and 

 hay, and on grain, hay and pomace; 25 lbs. of pomace were compared with 5 

 lbs. of hay. During the pomace period the animals produced 1,153 lbs. of milk, 

 and gained 24 lbs. in live weight ; during the hay period, 1,1.3S lbs. of milk, 

 and lost 6 lbs. in weight. On this basis 5 lbs. of pomace were more than 

 equivalent to 1 lb. of hay. Judging from this feeding test, and from the compo- 

 sition and digestibility of the pomace, it seems probable that 4 lbs., when fed in 

 what is termed a ' balanced ration,' would be equal in feeding value to 1 lb. of 

 good cow hay." 



Distillery and brewery by-products, J. B. Lindsey {Massachusetts Sta. Rpt. 

 1910, pt. 2, pp. 72S3). — ^A discussion of the feeding value of distillers' dried 

 grains; brewers' dried grains, and malt sprouts. Their chemical composition is 

 given and sample rations containing these ingredients are suggested for horses, 

 cattle, and pigs. 



Commercial feeding stuffs [analyses feeding standards, summer soiling 

 suggestions], J. L. Hills et al. {Vermont Sta. Bui. 158, pp. 175 212). — Results 

 are reported of analyses of 438 samples of feeding stuffs, including cotton-seed 

 meal, linseed meal, distillers' grains, bi'ewers' grains, malt sprouts, wheat bran, 

 wheat middlings, provender, dried beet pulp, ground oats, alfalfa meal, and 

 proprietary, gluten, molasses, hominy, poultry, and other mixed feeds. 



The bulletin also discusses in a general way the composition of feeds, and the 

 feeding standards of Armsby, Haecker, and the Scandinavian feed unit system. 

 Suggestions for summer soiling are given, and there is a brief report of an ex- 

 periment which indicated that cows shrank in milk much less when fed entirely 

 on grain and soiling crops than when partially soiled. 



[Composition, digestibility, and fertilizing ingredients of fodder articles], 

 P. H. Smith and J. B. Lindsey {Massachusetts Sta. Rpt. 1910, pt. 1, pp. 2.'/ 7- 



