[ 848 ] 



* Containing 34 < 43/ of N ous matter calculated as albuminoids 

 f Containing 



Silicates &c. ... ... =7-07 per cent. 



CaO ... ... ... ='69 



PsO 5 ... ... ... =i'49 



K 2 ... ... =1-15 



CHAPTER CXXXIX. 



ANALYSIS OF SIIvAGE, GRASS &c. 



TN analysing leaves, hay, silage and roots, some dif- 

 ference has to be made in the. estimation of albuminoids 

 from the method recommended for oil-cake for fodder, though 

 the moisture, oil, fibre and ash, are determined as in the 

 case of oil-cakes. Leaves &c. contain nitrates, amides and 

 amines, which have little or no feeding value. True albumi- 

 noids* should be separated from other nitrogen-compounds 

 and the Nitrogen in these alone estimated by one of the 

 two processes described in connection with the analysis of 

 soils. The separation of true albuminoids is done in the 

 following way : 



i>43 2< Orthophosphoric acid is put on the lid of a 

 Platinum crucible and gently heated on a triangle over a 

 Bunsen flame. Spurting is avoided by moving about the 

 Bunsen flame. When it becomes quite glassy Orthophosphoric 

 acid changes into Metaphosphoric acid. In this state it is 

 put inside a beaker along with the Pt-lid and a little distilled 

 water to dissolve the Metaphosphoric acid. 2 grammes of 



* According to Frankland the heat-producing power of fat to that of 

 albumen and starch, is as 100 : 47 '4 .-: 43-1. Fat and starch have no flesh. 

 forming power. Albumen is therefore complete food. 



