( 846 ] 



is collected in a beaker, dissolved in HNOs; ammonium 

 molybdate is added the Mg 2 P 2 O7 precipitate and estimated 

 as in the case of analysis of soil. 



1.427. The filtrate and washings are concentrated by 

 boiling, and ammonium oxalate added to precipitate calcium 

 oxalate in determining lime in the usual way. 



1.428. The filtrate and washings from the last are taken 

 to dryness in a sand-bath, ignited on a porcelain bason, and 

 treated as in the case of soil in estimating 2KC1, PtCl 4 . 



1.429. The following example shows how an analysis of 

 a sample of oil-cake for manure is worked out: 



(1) For moisture. 



Watch glasses + clip + raw cake ... ... =25*743 



Watch glasses + clip ... ... ... =24743 



Watch glasses + clip -f dry cake ... ... = 25*6595 



/. Moisture in i gram ... ='0835=8-35 / 

 Loss on Ignition. 



Crucible + ignited cake (i gram) ... ... =30-3280 



Crucible alone ... ... ... =29-4785 



.*. Loss on ignition ... ... ... ='8495 



=84-95 % 



Deducting 8-35 per cent, for moisture, 



(2) Organic matter &c ... ... =76*60% 



(3) Sand &v.- 



Crucible + sand &c. ... ... ... =30-390 



Crucible alone ... =29-327 



/.Sand &c. in 15 grams ... ... =1-063 



Deducting -002 for paper ash ... ... = 1*061 



.-. In i gram ... '0707 = 7'7% 



(4) Nitrogen calculated as Ammonia. 



Watch glass + cake ... ... ... =6-7855 



Watch glass alone ... ... ... =6' 1866 



.*. The quantity taken for combustion ... ='5989 gram 



c . C( --gg c . Ci O f the NaHO solution was 

 required to neutralize the pipette full of H 2 So 4 

 after combustion. 



