27 1 AGRICULTUTIAL MUSEUM 



to bear little relation to fertility or barrenness, and the 

 search for them would make the analysis much more 

 cjmpli'-ated without rendering it more useful, 



XIV". Statemp:nt of Results and Products. 

 When the examination of as')il is completed, the pro- 

 ducts should be classed, und their quantities added to- 

 ^I'th 'r, and if they nearly equal the original quanlily of 

 soil, th3 iLnalysis may be considered as accui'ate. It 

 must, however, be naticcd, that wlien phosphate or 

 suphate of lime are discoveied by the independent pro- 

 cess Xlll. a correction must be made for the general 

 process, by subtracting a sum equal to their weight 

 from the quantity o^ carbonate of lime, obtained by pre- 

 cipitation from the muriatic acid. 



In arrauj^iug the products, the form should be in the 



order of tije exepriments by which they were obtained* 



Thu^ 400 gra'ns of a g'ood sihcious sandy soil may 



be supposed to contain. Grains^ 



Of u ater of absorption - - 18 



or loose stones and gravel principally silicious 42 



O undf • mpounded vegetable hbi es - 10 



Of fine silicuus sand - - - 200 



Of muiutely divided matter separated by 270 



filtratitsn, and consisiing of 



Carbonate of lime - - 25 



Carb'-nate of Magnesia . - 4 

 Mattel destructible by heat, princi- 



pa l> vegetable 10 



, S.lex - - - - 40 



Alumine . , . 32 



Ox\ de of iron - - - 4 



Soluble matter, principally sulphate of 



pota-.h and vegetable extract - 5 



C» \ p um - - - 3 



Pho^phate of lime - - - 2 125 



Amount of all the products S&5 



-9 



