190 



106. ANALYSIS OF SOILS AND EOCKS, 



CHEMICAL ANALYSIS. 

 100 parts of the soil dried at 100° yielded 



Si-*! 3 



i:? 



Acids of humus ..3.25 



Humus coal 1.75 



Other organic matter 1.25 containin 



Ammonia 0.02 " 



Nitric acid 0.009 " 



Total nitrogen 



"Water chemically combined or 

 otherwise retained at 100° 1 .221 



Soluble in water 2.10 



Soluble in alkali 1.25 



nitrogen 0.01 



0.0165 



0.0023 



0.0288 



.500 



Carbonic acid (det. in another portion) 0.14' 



Lime , 0.17 



Magnesia 0.50 



Ferric oxide 5 . 05 



Manganic oxide traces 



Alumina 4.20 



Po tassa . 06 



Soda 0.02 



Phosphoric acid 0.15 



Sulphuric acid 0. 04 



Silica 0.35 



Chlorine (det. in aqueous solution) 0.073 



10.753 



Deduct oxygen equivalent to the chlorine .003 



10.75 



f.5_ fLime 0.31 



gtc Magnesia 0.96 



*^ ^ And so on, as in the statement of the analysis of the 

 solution in cold acid, with the exception of Chknine^ 

 and the addition o^ Silica, (dissolved out of the resi- 

 due insoluble iu hot acid, by boiling sodic carbon- 

 ate) 



15.24 



8w 





S5 



pi 



r Volatile matter expelled on ignition 1 , 



Lime 0. 



Magnesia 0. 



Ferric oxide 1, 



Alumina 1. 



Potash 0. 



Soda ., 0. 



Phosphoric acid..; 0. 



Silica, in solution 0. 



" (dissolved out of the residue insoluble 



in H2SO4 by boiling NaaCOa . . . .. 4. 

 10. 



S.I^&H 





l^ 



tCfl O 



c o 



fLime trace 



Magnesia " 



Ferric oxide 0.00 



Alumina . 91 



Potassa 3.20 



Soda 2.11 



Silica 44.00 



5(5.22 



