Elements, Symbols and Analyses. 183 



Analyses, continued. 



Magnesium oxide 6.06 



Ferric oxide 0.68 



Potassium oxide 1.92 



Phosphoric acid 1.79 



Insoluble matter, before calcination 5.49 



" after '^ 2.57 



55. Coal-Aihc8, Bituminous. 



Water 5.0 Soda 0.4 



Organic substance .... 5.0 Magnesia 3.2 



Ash 95.0 Phosphoric acid 0.2 



Potash 0.4 Sulphuric acid 8.5 



56. Coal-Ashes, Anthracite. 



Water 5.0 Soda 0.1 



Organic substance .... 5.0 Magnesia 3.0 



Ash 90.0 Phosphoric acid . . . . 0,1 



Potash 0.1 Sulphuric acid 5.0 



57. Gas-Lime — Average of 4 Analyses. 



Moisture at 100° C. . . . 22.28 Sulphuric acid* 20.73 



Calcium oxide 42.66 Insoluble matter .... 6.05 



Magnesium oxide .... 8.30 



* Sulphuric acid includes all forms of sulphur present. 



(e.) Trade Values for 1891 of Fertilizing Ingredients in 

 Raw Materials and Chemicals. Adopted by Experiment 

 Stations of Mass., New Jersey, Penn. and Conn. 



Cts. 

 per lb. 



Nitrogen in ammoniates 18)^ 



" nitrates 14)^ 



Organic nitrogen in dry and fine ground fish, meat and blood . 15)^ 

 cotton-seed meal and castor-pomace . . 15 



fine bono and tankage 15 



fine medium bone and tankage 12 



medium bone and tankage 9)^ 



coarser bone and tankage 7)^ 



hair, horn-shavings and coarse fish-scrap 7 



