ELEMENTS, SYMBOLS, AND ANALYSES. 273 



40. Bone-Black. 



Moisture at 100 C. . . 5.04 Phosphoric acid . . . 16.56 

 Ash 67.43 Insoluble matter . . . 0.37 



41. Bone Charcoal. 

 Moisture at 100 C. . .18.16 Reverted phosphoric 



Ash 72.24 acid 5.18 



Total phosphoric acid . 25.58 Insoluble phosphoric 



Soluble phosphoric acid 0.38 acid 20.02 



Insoluble matter . . . 0.69 



42. Ground Bones. (Two samples.) 



i. ii. 



Moisture at 100 C 3.97 12.43 



Ash 49.35 64.21 



Total phosphoric acid 19.49 25.67 



Reverted phosphoric acid 3.80 6.20 



Insoluble phosphoric acid 15.69 19.34 



Nitrogen 4.04 2.68 



Insoluble matter 0.78 0.42 



43. Dried Blood. 

 Moisture 15.02 Nitrogen 8.24 



44. Dry Ground Fish. 



Moisture at 100 C. 8.34 



Ash 37.76 



Total phosphoric acid 8.23 



Soluble phosphoric acid 0.10 



Reverted phosphoric acid 3.81 



Insoluble phosphoric acid 4.32 



Nitrogen 6.81 



Insoluble matter 0.82 



45. Sulphate of Ammonia. 



This article, now manufactured on a large scale as a by-prod- 

 uct of gas-works, usually contains over 20 per cent of nitrogen, 

 T 



