[ 827 ] 



Calicium Carbonate. 



Weight of crucible + CaCOa precipate= 29-47 grammes 

 Weight of crucible alone ... =2933525 



Difference = '13475 

 Deducting paper ash ... = '00200 



Weight of Calicium Carbonate in 



i gramme ... ... = '13275 grammes (V) 



Nitrogen.* The H 2 SO 4 bulb took exactly 91 c. c. of NaHO 



solutions. /. the NHs in i gramme is equivalent to 



9 c. c. of alkali, which is equivalent to 9 x '003 1095 



=0279855 grammes of N='03398 grammes of NH 3 



=3-398 per cent. 



1,407. The percentage composition of the sample of bone- 

 meal is therefore : 



(I) Moisture ... ... 10-625 



(II) Organic matter* ... ... 27-150 



(III) Sand ... ... .., 5-850 



(IV) Phosphates ... ... 41*600 



(V) Calcium carbonate... ... 13*275 



(VI) Saline matter (undetermined) ... 1*500 



lOO'OO 



CHAPTER CXXXVL 



ANALYSIS OF SUPER. 



TN analysing a sample of Superphosphate of Lime, the fol- 

 lowing points should be determined : 

 (i) Moisture ; (2) Loss on ignition ; (3) Sand ; (4) Lime ; 



Containing 3-398 / of NH S 



