FOODS ANIMAL PRODUCTION. 



445 



Composilion of Hinujurian haji. 



Averageof compilations by Jenkins and AVinton. 

 Averajje of New Euglaud analyses 



Water. 



Per ct. 



1.1 

 24.2 



Pro- 

 tein. 



Per ct. 

 7.5 

 7.2 



Fat. 



Per ct. 

 2.1 

 2.3 



Nitrogen- 

 free 

 extract. 



Per ct. Per ct. 



49. I 27. 7 

 36.9 I 23.7 



Asll. 



Per ct. 

 0.0 



5.7 



"These differences in composition were largely clue to water content; but that 

 they were not entirely clue to the different percentages of water is shown by the 

 composition calculated to water-free substance, as follows : " 



Average of compilations by Jenkins and Wiiiton. 

 Average of New England analyses 



Pro- 

 tein. 



Per ct. 

 8.1 

 9.tJ 



Per ct. 

 2.3 

 3.0 



Nitrogen- 

 free 

 extract. 



Fiber, i Ash. 



Per ct. 

 53.1 

 48.8 



Per ct. 

 30.0 



Per ct. 

 6.5 



The digestibility of feeding stuffs, C. D. Woods {Connecticut 

 Storrs aSY^. Rpt. ISDS^ pp. 15(j-l(J7). — This is ii coiiipilatioii, and coutaius 

 a translation of the summary of Dietiich and Ktinig's compilation of 

 digestion coefficients, Jordan's compilation of American digestion 

 experiments (E. S. II., G, p. 5), and a summary of the average coefft- 

 cients of digestibility given in tlie above two compilations. 



Calculation of rations, C. D. Woods {Connecticut Sforrs Sta. Rpt. 

 ISOo^pp. 168-173). — I>y means of the tables of composition and digest- 

 ibility given above tlie calculation is made of the amounts of digesti- 

 ble nutrients in 1 lb. of different feeding stuffs, and the use of this 

 data in the calculati(m of rations is explained. 



Process for rendering foods and feeding stuffs more digestible, 

 E. Maris {Engli.sh P(dent; Jour. Soc. Chem. Ind., 13 {1894), No. 9, p. 

 898). — The materials are submitted to a preparatory treatment by 

 crushing and artificial digestion, or reproducing as nearly as possible 

 the different pliases of natural digestion. The ground material is put 

 into digestion troughs with ,'> or 4 times its weight of water and sliglitly 

 acidulated with hydrochloric acid and sea salt, after which the neces- 

 sary ferment (as pepsin, trypsin, invertin, amylase, aiul mineral ferment 

 from grains, cereals, etc.) to the extent of 5 per cent is added, and the 

 contents kept at a temperature of 35° O. for 12 hours. It is then trans- 

 ferred to a digester in which it is allowed to remain for 2 hours under 

 steam pressure. The temperature is first raised to ()5o C, aud finally 

 to 130° 0. to destroy ferments and germs. The composition of a 

 fodder made from wood by this process is as follows: 



Per cent. 



Water 1-^-00 



Albuminoid matter 8. 74 



Fats 2.65 



Nitrogen-free extract 38. 64 



Ligneous matter 31. 00 



Ash 6.00 



100. 00 



