874 



EXPERIMENT STATION EECOKD. 



combustion determined in the usual way. Tlif i-csults rodueed to a 

 water-free and ash-free basis folloAv: 



Heat of combustion of rrudi' filwr from fodders and feres cor respond iiir/ to iliem. 



Source of crude fiber. 



Heat of 

 combus- 

 tion. 



Oat liay 



Clover silage 



Oat-and-pea silage . 



Average 



Calories. 

 4.405 

 4.610 

 4.667 



4.561 



Source of crude fiber. 



Heat of 

 combus- 

 tion. 



Feces from oat hay 



Feces from clover "siiage 



Feces from oat-and-pea silage 



Average 



Calorics. 

 4.662 

 !i.2iri 

 4.S20 



4.899 



"The crude fiber from the feces had, in tliese 3 cases, an average determined fuel 

 vahie over 7 per cent higher than tliat of tlie fiber from the corresponding fodders. 

 In other words, the digestible crude fiber had a lower fuel value than that remain- 

 ing in the feces, and consequently, lower than that of the mixture of carbohydrates 

 included in that term as found in the original fodders." 



Experiments on the influence of asparagin and ammonia upon 

 the metabolism of protein in herbivora, O. Kellxek et al. {Zt^sc/i/: 

 Blol.^ 39 (1900), ]Vo. o,jjj}. 31J-S76). — The experiments of other inves- 

 tigators on the effects of asparagin are reviewed in some detail, and 4 

 series of experiments with sheep are reported. In each series 2 animals 

 were used. In the first period of the first series the ration contained 

 a limited amount of protein. In the second period asparagin was 

 added to practically the same ration. In the second series the ration 

 contained a limited amount of protein in the first period. IiT the 

 second period ammonium acetate, and in the third asparagin was added 

 to practically the same ration. In the first period of the third and 

 fourth series the ration contained a medium amount of protein, and 

 asparagin was added in the second period. The experimental data are 

 recorded in full. The digestibility of the ration was determined in the 

 different periods, and the l)alance of income and outgo of nitrogen. 



In the first series the balance of income and outgo of sulphur was 

 also determined, and was as follows: 



M('t(d)ollsm of sulplmr in a ration v:ith and irithout axparai/in. — Krj>erinn'nts iritJi slieej). 



Experiment 1. 



Sulphur. 



In food. I In urine. In feces. ^^^^[1)] 



Period 1 (withoiit asparagin): 



Sheep 1 



Sheep 2 



Period 2 (with asparagin): 



Sheep 1 



Sheep 2 



Gill. 

 1.807 

 1.781 



l.xlT 

 1.795 



Gm. 

 0.927 

 .957 



. S49 



. S05 



Gin. 

 0. 878 

 .834 



.946 

 .918 



Gm. 

 -f 0.002 

 - .010 



4- .022 

 -f .072 



In some of tiie cxperiinents the urine was anah'zed during the days 

 which elapsed ))etween the different periods. The results of the tests 

 are discussed in d(»tail. The prin(ii)al conchision reached is the fol- 



