Compound Celluloses 167 



() (J) (f) 



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. Westfal, 1877, p. 19). 



Proteids 15 -56 15*89 17 -35 



Fat 2-53 274 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 '63 



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 : 



Brans Rice meal 



C . 

 H . 



N . 

 O . 

 Ash 



