234 EUROPEAN AGRICULTURE. 



manured with bone-dust, potash, ammonia, and common salt, the 

 clover scarcely appeared above ground.&quot; [Here, though so 

 much stress is laid upon the infinitesimally minute divisions of 

 the soil, we are left entirely at a loss as to the quantities or forms 

 in which these applications were made.] &quot; The divisions of 

 the field, which had been manured in the first year with peat- 

 ashes, ammonia, and ashes of wood, were sown with buck-wheat 

 after the removal of the first crop of clover. The buck-wheat 

 succeeded very well on all the divisions, yet a marked difference 

 was perceptible in favor of the portion treated with ammonia. 

 These experiments show us, that a dressing of lime did not com 

 pletely remove from the soil its tendency to impart rust to the 

 plants grown upon it.&quot; [But if the lime partially corrected the 

 evil, is there not reason to infer that the error was in not putting 

 lime enough upon it, and that more would have completely re 

 moved it ?] &quot; Nevertheless,&quot; the writer adds, &quot; it is highly prob 

 able that, as soon as the protoxide of iron became converted into 

 the peroxide by exposure to the atmosphere, lime would possess 

 more power in decomposing the phosphate of iron.&quot; 



I shall cite only one more example in this case. 



&quot; 4. Subsoil of a loamy soil in the vicinity of Brunswick. It 

 is remarkable that sainfoin cannot be cultivated upon it more 

 than two or three years in succession. The portion analyzed 

 was taken from a depth of five feet. One hundred parts con 

 tained 



u Silica, with very fine silicious sand, . . . . 90.035 



Alumina, 1.976 



Peroxide of iron, 4.700 



Protoxide of iron, 1.115 



Protoxide and peroxide of manganese, 0.240 



Lime, 0.022 



Magnesia, 0.115 



Potash and soda, 0.300 



Phosphoric acid combined with iron, 0.098 



Sulphuric acid, (the greatest part in combination 



with protoxide of iron, ) 1.399 



Chlorine, a trace. 



100.000 



