Eleme7its, Symbols a?id Analyses. i8i 



Analyses, continued. 



43. DriM Blood. 

 Moisture 15.02 Nitrogen 8.24 



44. Dt^ 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, 

 the equivalent of from 94 to 97 per cent, of sulphate of ammonia. 

 The rest is chiefly moisture. 

 Nitrogen 20.02 Equivalent ammonia . . 24.30 



46. Sulphate of Potash. (Two samples.) 



The double sulphate of potash and magnesia is usually sold as 

 " sulphate of potash. " 



I. II. 



Actual potash 27.76 51.28 



Equivalent sulphate of potash 51.3 94.80 



47. Sulphate of Magnesia. 



Moisture at 100° C. . . . 29.01 Sulphuric acid . . . .30.35 

 Magnesium oxide . . . .15.87 Insoluble matter .... 6.29 



48. Nitrate of Soda. 



Nitrate of soda is mined in Chile and purified there before ship- 

 ment. It usually contains about 16 per cent, of nitrogen, equiv- 

 alent to 97 per cent, of pure nitrate of soda. It contains besides, 

 a little salt and some moisture. 



Moisture 35 Sulphate of soda .... 0.21 



iSalt (sodium chloride) . . .23 Pure nitrate of soda . . . 99.21 



