78 



had grown in the granitic soil, contained most water ; but that the 

 proportion of charcoal was nearly alike in those of each soil. The 

 quantity, however, and proportion of the earths which he found 

 they contained, corresponded, very nearly, with the contents of the 

 respective soils ; thus the trees which grew in the granitic soil, 

 abounded in silica, and contained metallic oxides ; whilst those 

 which grew in the calcareous soil, contained no metallic oxide, but 

 a considerable proportion of lime. This, however, will appear 

 more obvious by the following tabular representation of the results 

 of his experiments, made with the pinus abies. 



Analysis demonstrated the contents of the two soils and the con- 

 stituent parts of the pinus abies, in the different soils to be as 

 follows : 



Analysis of the Granitic Soil. 



73,25 Silica 

 13,25 Alumine 



1,74 Lime 



9,00 Iron and manganese 



97,24 



Analysis of the Calcareous Soil. 



98,000 Carbonate of lime 

 0,625 Alumine 

 0,625 Oxide of iron 

 O,02 5 Petroleum 



99,275 



Analysis of the Fixed Substances contain- 

 ed in the Pinus Abies, growing in the 

 Granitic Soil. 



13,49 Silica 



14,86 Alumine 



46,34 Carbonate of lime 



10,52 Metallic oxides 

 3,60 Pot-ash 



4,24 Alkaline sulphates and muriates 

 0,77 Carbonate of magnesia 



99,82 



Of the Fixed Substances , containedinthe Pi- 

 nus Abies growing in the Calcareous Soil. 



63 Carbonate of lime 

 16 Alumine 



15 Alkalies and alkaline sulphates 

 and muriates 



94 



The absorption of earths, metallic oxides, and various saline sub- 

 stances, for the accomplishment of important purposes, in the vege- 



