366 HOW CROl'S FEED. 



wheat soils of Mid Lothian, analyzed by Dr. Anderson. 

 The air-dry surface-soil contained in 100 parts : 



Silica 71.553 



Alumina 6.935 



Peroxide of iron 5.173 



Lime 1.229 



Magnesia 1.082 



Potash 0.354 



Soda 0.433 



Sulphuric acid 0.044 



Phosphoric acid 0.430 



Chlorine traces 



Organic matter 10.198 



Water 2.684 



100.116 



"We observe that lime, potash, and sulphuric acid, are 

 much less abundant than in the soil from the Zuider Zee. 

 The quantity of ])hos2:)horic acid is about the same. The 

 amount of sulphuric acid is but one-twentieth that in the 

 Holland soil, and is accordingly enough for 15 good bar- 

 ley crops. 



Lastly may be instanced the author's analysis of a soil 

 from the Upper Palatinate, which was characterized by 

 Dr. Sendtner, who collected it, as " the most sterile soil in 

 Bavaria." 



Water .0.535 



Organic matter 1.850 



Silica ; 0.016 



Oxide of iron and alumina 1.640 



Lime 0.096 



Magnesia trace 



Carbonic acid trace 



Phosphoric acid trace 



Chlorine trace 



Alkalies none 



Quartz and insoluble silicates 95.863 



100.000 



Here we note the absence in weighable quantity of 

 magnesia and phos})horic acid, while potash could not even 



