[ 849 ] 



silage, hay, or any other food-stuff of this class that is 

 analysed, are put in a beaker, moistened with a warm Phenol 

 solution (4%), and a few drops of the metaphosphoric acid 

 solution are added. After a quarter of an hour 100 c. c. of 

 the same phenol solution in a boiling state, are added, the 

 mixture stirred, and then left to cool. The whole is then 

 transferred to a filter, the washing being done with the help 

 of a wash-bottle containing the same phenol solution in a 

 cold state. The albuminoids getting coagulated by the phenol 

 solution remain on the filter, while the non-albuminoid nitrogen- 

 ous compounds pass off with the filtrate. The contents of 

 the filter are then dried and the nitrogen therein estimated 

 either by the combustion process or by Kjeldahl's method. 



1,433. The following figures refer to an actual analysis 

 of a sample of silage : 

 Moisture. 



Crucible + powdered silage ... =30*860 



Crucible alone ... ... =29-327 



If 533 grammes taken 

 Crucible -I- dry silage ... ... =3755 



.*. Loss in i'533 grammes ='105 



=6-84 % 



Dry silage taken ... =1-533 '105=1-428 grammes 



Fibre. Glass + stopper + silage =37-446 



Glass 4- stopper ... =34-446 



3 grammes taken 



Wt. of porcelain crucible + dry fibre =12*0995 

 Wt. of porcelain crucible alone ... =10*9665 



3 I '''330 



Ash.- 



Crucible + dry silage ... ... =30*7550 



Crucible + ignited residue ... =29-4445 



1*3105 org. matter 

 ccccc 



