Compound Celluloses 167 



() (J) to 



Starch 62-48 42-02 26-61 



N-free extractives . . . 70-38 64*8 66-50 



These specimens were selected in accordance with gradations 

 in recognised feeding value from a to c, gradations corresponding 

 approximately with the ascertained proportions of starch, but alto- 

 gether at variance with the numbers for * N-free extract.' 



In further illustration of the same point the authors cite the 

 following more complete analysis of meals (Brunner, Landw. 

 Ztg. VVestfal, 1877, p. 19). 



() (6) to 



Proteids 15-56 15-89 17-35 



Fat 2-53 2-74 5-63 



N-free extractives . . . 65-87 65-23 65-28 



Crude fibre .... 8-33 9-17 6-84 



Ash ..... 771 6-97 4-90 



Direct estimation of starch by 



malt method . . . 27-93 3*4 53*^3 



It is again evident that the 'N-free extractives' are not a 

 measure of the nutritive value ; but, on the other hand, by a direct 

 estimation of the starch, the method becomes more complete. 



The authors then completed their investigation by taking as the 

 basis of observation food-stuffs deprived of fats, by extraction with 

 ether-alcohol, and starch, by digestion with water and malt extract 

 at 50-60. The residue, which they termed ' Grundsubstanz,' was 

 then subjected to the Weende method of hydrolysis ; and by deter- 

 minations of elementary composition of the residues, the com- 

 position of the dissolved constituents was arrived at. 



The specimens investigated were three grades of wheat-brans 

 (pollards) and two specimens of rice meal. The materials operated 

 on, viz. residues from the treatments above described, had the 

 following composition : 



C . 

 H . 



N . 

 O . 



Ash 



