228 SOIL. 



O^-icmane, 6.95 j "^^ 'o/^t.'" 



SiUca 71^ 



Alumina 11.40 



Oxide of iron 5.62 



Lime 0.80 



Magnesia 1.22 



Alkaline chlorides 1.21 



Phosphoric acid a trace. 



Loss 1.24 



100.00 



Bergman gives the following as the composition of a fertile soil i* 

 Sweden : 



Carbonate of lime 30 



Gravel 30 i 



Silicious sand 26vClay. 



Alumina 14 > 



100.0 



Several fertile soils of Senegal, examined by M. Laugier, con- 

 ained : 



Rawei. 



Silicious sand and silica 87.0 



Alumina 3.6 



Oxide of iron 3.4 



Carbonate of lime tnice 



Organic matter and water 4.4 



Loss 1.6 



100.0 100.0 lUO.O 100.0 100.0 



M. Plagne, who has studied the agriculture of the Coromandel 

 coast, divides the soils he met wiih there into argillaceous, or clayey, 

 sandy, and mixed, and gives their several compositions as follows : 



Arj^i'iacroti*. Sanilx- Miud. 



Silica 22.0 8ia 64.0 



Alumina .VJ.O 6.5 19.5 



CarlM)nntc of lime 3.5 3.5 2.5 



O.xidc of iron 2.5 4.0 4.0 



rhn«i)h.itc of ninenesla "i an *»•<> 



Suiphntooflime^ " i ^'^ *""> 



A7.i>li7.cd organic mattrr 5.0 " 7.0 



Water nn(llo>s '_ ^i! _^^^ _M 



"Too.o looTo loao 



The soils in which the tea-plant is grown in Assam and fhina, 

 have been examined by Mr. Piddington;* they contain respectively: 



Chiiiric >oiI. A.«Mio toil. 



Silica and Mind 76.0 84.8 



Aiuniina 9.0 4.5 



Oxideofiron 9.9 7.0 



Phosphate and sulphdte of lime 1.0 traces 



Organic matter 1.0 1.5 



Water 2L0 SJ 



99.9 100.1 



Sir Iluniplirey Davy found the various soils most generally culti 

 rited in Kiiglanil, to have the following composition ; 



• B«l»in-<on. .Nirouni of \-<nin. p. l.TO. 



