230 



ON THE CHEMICAL CONSTITUENTS OF SOILS. 



Phosphate of lime 

 Sulphate of lime 

 Common salt 



1-510 



a trace 



0015 



100-000 



At a greater depth than the subsoil of which the 

 analysis is here given, the soil passes into marl, 

 which contains 20| per cent, of carbonate of lime. 

 The sulphuric acid deficient in the soil was supplied 

 by means of the gypsum. 



SOILS IN THE KINGDOM OF HANOVER. 



20. (A) Analysis of a barren heath-soil from 

 Aurich in Ostfriesland ; (B) a sandy soil containing 

 much humus but also sterile; (C) a sandy soil 

 possessing the same characters as B. 100 parts 

 contained : — 



100-000 100-000 100000 

 21. Analysis of the clayey subsoil of a moor, 

 which, after being burned, is used as a manure to 

 the above soils A, B, C. 100 parts contain : — 



Silica and siliceous sand . . . 87*219 



Alumina . . . . . , 4*200 



Peroxide of iron with a little phosphoric acid . 5.200 



Peroxide of manganese . . . 0-310 



Lime ...... 0-320 



Magnesia ...... 0380 



Potash principally combined with silica . 0- 130 



Soda principally combined with silica . . 0-274 

 Sulphuric acid combined with lime, magnesia, and 



potash . . ... 0-965 



Chlorine ..... 0-002 



Humus . . . . . . 1000 



100-000 



