[ 844 ] 



(5) Soluble organic matter^ or albuminoids, mucilage and other solu- 

 ble non-nitrogenous substances. 



Total organic matter as ascertained by ignition ==-82846 grms. 

 But of this, weights of oil and fibre- -06466 + -i 1850 



= 18316 grms. 

 /. weight of soluble organic matter = '6453 ,, 



(6) Albuminoids (Nitrogen). 



79*3 c.c. of the standard alkali were required to neutralise 



20 c. c. of the standard H 2 SO 4 -solution at the titration 

 operation. 

 .*. An amount of NH 3 corresponding to 100-79-3. 



-20*7 c.c. of the standard NaHO solution was con- 

 tained in i grm. of oil-cake. 

 But i c.c. of alkali represents -0031095 grms. of N and 



0037758 of NH 3 

 .-. 2O'7 c.c. of the alkali 20-7 x -0031095 grms. of N 



=063665 grm. (N). 

 and 20-7 x '0037758 grm. of NH 3 

 -07816 grammes (NH 3 ) 

 -=40744 grammes of albuminoid. 



1.421. The percentage composition of the sample of oil- 

 cake analysed was therefore 



(1) Moisture ... ... - 10*242 



(2) Ash ... ... -6-912 



(3) Fibre ... ... -6-466 



(4) Oil ... ... =-11-850 



(5) Albuminoids ... =40*744 



(6) Soluble organic matters... -23786 



lOO'OOO 



1.422. Starch and sugar. While analysing a sample of 

 cake for fodder, it should be noted if there is any starch or 

 sugar, in the cake, which are indicative of adulteration. 

 Two grammes of cake may be taken in a small (4 or 

 5 ounce) beaker, 100 c. c. of water added, the mixture 

 boiled for 5 minutes, and then allowed to cool. One 



