324 AGRICULTURAL TEXT-BOOK. 



wood (dry,) affords only 0.83 in 100 parts of ashes; of which 

 50 are soluble, 50 insoluble. Wheat straw yields 4.40 in 100 

 parts, 19 per cent, being soluble, 81 insoluble. 



Composition of the ashes of hard wood, (oak, beech, birch, 

 &c., (A) ; of Pine, (Pinus abies,) (B) ; and of wheat straw, 

 (C). (Dana.) 



100 parts of soluble contain A, B. C. 



Carbonic Acid, 22.70 13.50 



Sulphuric Acid, 6.43 6.90 02 



Muriatic Acid, 1.82 13.0 



Silex, 95 2.00 35.6 



Potash and Soda, 67.96 69.70 50.0 



Water, 7.90 



100 parts of the insoluble contain, A. B- C. 



Carbonic Acid, 35.80 21.50 



Phosphoric Acid, 3.40 1.80 1.20 



Silex, 4.25 13.00 75.00 



Oxide of Iron, 0.52 22.30 2.50 



Oxide of Manganese, 2 15 5.50 



Magnesia, 3.55 8.70 



Lime, 35.80 2720 5.80 



Charcoal, 15.50 



The following gives a comparative view of the entire ashes 

 of the oak (A,) ; elm (Jj,) ; Beech ( CJ ; and fir tree (pinus 

 sylvestris,) ; (2) ,) ; analysed in Europe. (Johnston.) 



It is thus obvious that, by leaching, little else is removed than 



