242 



DR. DAUBENY ON THE ROTATION OF CROPS, ETC. 



manured, the ingredients of the impalpable portion of the soil, which had passed 

 through the meshes of a fine sieve, were found by Mr. Way to be as follows : — 



2760-00 

 The soil of the garden in which the experiments had been conducted was also sub- 

 jected to a similar examination, the plot which had grown a crop of barley for ten 

 years without manure having been selected. 

 The following were the results : — 



Sand and clay. 

 Organic matter 



Silica . . . 

 Lime. . . . 

 Peroxide of iron 

 Magnesia . . 

 Alumina . . 

 Sulphuric acid 

 Carbonic acid . 

 Potass . . . 

 Soda .... 

 Phosphate of lime 

 Chlorine . . 

 Loss 



Coarse sand . . 

 Stones and pebbles 



407*00 



75*00 



109-20 



144-17 



103-80 



•85 



25^00 



r65 



125-69 



2-91 



•29 



•80 



a trace. 



3-64 



1000-00 

 810-00 

 660-00 



2470-00 



