668 



EXPERIMENT STATION RECORD. 



of the carbohydrate group. The methods followed are described. 

 The following tabic summarizes the results obtained: 



Coefficients of digestibility of different constituents of the carbohydrate group — Experiments 



with sheep. 



Timothy hay No. 1 



Crab-grass hay No. 1 



(average of 2 sheep) . 



Crab-grass hay No. 2 



and cowpea meal 



(averageof 2sheep) 



Whole ration 



Cowpea meal 



Crab-grass hay No. 1 

 and corn bran (av- 

 erage of 2 .sheep) : 



Whole ration '. 



Corn bran , 



Green rape No. 1 (av- 

 erage of 2 .sheep) .. 

 Green rape No. 2 (av- 

 erage of 2 sheep) .. 

 Crab-grass hay No. 1 

 and rice bran (aver- 

 age of 2 .sheep): 



Whole ration 



Rice bran 



Timothy hay No. 2 

 ( average of 2 sheep ) . 



Per ct. 



70.9 

 86.7 



88.5 

 81.0 



.59.7 

 G4.7 



51.3 



Per ct. 

 100 



100 

 100 



100 

 100 



100 

 100 



100 

 100 



Per ct. 

 60.3 



49.7 



76.6 

 95.4 



74.6 

 80.3 



65.9 

 80.4 



Per ct. 

 53.5 



47.5 



74.8 

 95.0 



73.5 

 79.5 



92.5 



87.9 



64.6 

 79.9 



Per ct. 



55.8 



65.9 

 76.1 



69.2 

 71.6 



94.6 

 91.9 



60.4 

 53.5 



5.5.9 



Per ct. 

 58.1 



66.6 

 76.1 



70.4 

 71.6 



9.5.7 

 93.2 



64.4 

 57.3 



Per ct. 

 50.1 



77.7 

 97.4 



77.1 



86.1 



91.4 



86.5 



66.6 

 85.0 



Per ct. 

 52.3 



64.4 

 39.2 



59.8 

 50.8 



90.0 

 84.0 



55.8 

 19.1 



53.8 



Per ct 

 46.9 



69.9 



46.3 



84.6 

 75.9 



60.3 



Per ct. 

 53.3 



64.6 

 39.2 



61.7 

 50.8 



90.4 



84.6 



Per ct. 

 34.2 



The experiments are discussed in relation to similar work at other 

 stations. The author's principal deductions follow: 



" Sugars are found in all feeding stuffs, sometimes in large percentages are com- 

 pletely digested, and their determination is of importance in the case of hays and 

 cotton-seed meal. Subtraction of sugars from the nitrogen-free extract of hays 

 reduces its digestibility appreciably. With concentrated feeding stuffs the reduction 

 is slight. 



' ' The total pentosans are distributed between the nitrogen-free extract and the crude 

 fiber. The former are here called true pentosans, the latter pseudo-pentosans. The 

 true pentosans have a higher coefficient of digestibility than the pseudo-pentosans. 

 They form from 79.3 to 100 per cent of the total pentosans. True pentosans and 

 sugars make up from 22 to 52.6 per cent of the nitrogen-free extract. 



" The constituents of the nitrogen-free extract can be arranged in the following 

 order, according to their digestibility: (1) sugar, (2) starch, (3) pentosans, (4) 

 remainder. Crude fiber may be divided into pseudo-pentosans and residue. The 

 pseudo-pentosans make up from to 14.4 per cent of the crude fiber, and are less 

 digestible, as a rule." 



Cod-liver oil for calves {Bd. Agr. [London], Rpt. Agr, Educa- 

 tion and Research, lHOD-1900, ^p. 107-109).— The Yorkshire College 

 reports tests of the value of cod-liver oil as a substitute for milk fat 

 and for meal in feeding calves. Calves fed on whole milk for 12 



