DR. DAUBENY ON THE ROTATION OF CROPS, ETC. 



231 



The following will show the composition of the three crops of flax, after deducting 

 the extraneous matters present in the ash. 



Beans. 



Standard crop grown in a part of the Botanic Garden distinct from the poi-tion 

 set apart for the experiments. 



100 grains yielded 6'45 of ash, 100 grains of which consisted of — 



Sand and charcoal 12*00 



Peroxide of iron 2-33 



14*33 



Silica 2*44 



Phosphoric acid . I'll 



Sulphuric acid 2*95 



Carbonic acid 17'38 



Chloride of sodium ..... . . 2*58 



Chloride of potassium .... . . 0*91 



Soda . . . . . . . 0*00 



Potass .. . 30*37 



Magnesia ........... . . . 2*69 



Lime . . . . . . . . . . .^ .^ 1717 • 



. ^ ^ ^ * 98-57 



• ' 14-33 



Real ingredients .... 84-26 



