230 EUROPEAN AGRICULTURE. 



find many soils, where the climate did not forbid it, which would 

 not produce good crops under such treatment.] 



Silica, and coarse silicious sand, 71.504 



Alumina, 0.780 



Protoxide, and peroxide of iron, principally com 

 bined with humus, 0.420 



Peroxide of manganese, idem, 0.220 



Lime, idem, 0.134 



Magnesia, idem, 0.032 



Potash and soda, principally as silicates, .... 0.058 



Phosphoric acid, principally as phosphate of iron, . 0.115 



Sulphuric acid, (in gypsum,) 0.018 



Chlorine, (in common salt,) 0.014 



Humus soluble in alkalies, 9.820 



Humus with vegetable remains, 14.975 



Resinous matters, 1.910 



100.000 



&quot; Ashes of the soil of the heath before being converted into 

 arable land : 



&quot; Silica, with silicious sand, 92.641 



Alumina, 1.352 



Oxides of iron and manganese, 2.324 



Lime in combination with sulphuric and phosphoric 



acids, 0.929 



Magnesia combined with sulphuric acid, .... 0.283 

 Potash and soda, (principally as sulphates and 



phosphates,) 0.564 



Phosphoric acid, combined with lime, .... 0.250 



Sulphuric acid, with potash, soda, and lime, . . . 1.620 



Chlorine in common salt, 0.037 



&quot;100.000 



&quot; 2. Surface soil of a fine-grained loam, from the vicinity of 

 Brunswick. It is remarkable from the circumstance that not a 

 single year passes in which corn [wheat] plants are cultivated 

 upon it, without the stem of the plants being attacked by rust. 



