CHEMICAL COMPOUNDS. 343 



APPEISTDIX II. 



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Composition of some Compounds in Fertilizers. 



100 parts of nitric acid contain 26.0 parts nitrogen, 

 ammonia " 54.0 " " 

 " nitrate of potassa contain 46.6 parts potassium oxide. 



" " " (or saltpetre) contain 53.4 parts nitric acid. 



" nitrate of soda contain 36.75 parts sodium oxide. 



" " (Chili saltpetre) contain 63.25 parts nitric acid, 



sulphate of potassa contain 54.9 parts potassium oxide. 



46.0 " sulphuric acid. 

 " sulphate of lime (free of water) contain 41.0 parts calcium 



oxide (lime). 

 "• sulphate of lime (free of watei-) contain 59.0 parts sulphuric 



acid. 

 " sulphate of lime (with water, gypsum) contain 32.5 parts 



calcium oxide (lime). 

 *' sulphate of lime (with water, gypsum) contain 46.5 parts 



sulphuric acid. 

 " sulphate of lime (with water, gypsum) contain 21.0 parts 



water. 

 " bone phosphate (or tricalcic phosphate) contain 54.0 parts 



calcium oxide (lime). 

 " bone phosphate (or tricalcic phosphate) contain 46.0 parts 



phosphoric acid. 

 " carbonate of lime contain 56.0 parts calcium oxide (lime). 



44.0 " carbonic acid. 

 " chloride of potassium contain 52.4 parts potassium. 



" " " 63.1 " potassium oxide. 



" 47.6 " chlorine. 



