47 



been prosecuted accordiug* to Grandeau's method, and the following 

 statements indicate the results obtained. 

 Preliminary analysis of soil gave : 



Moisture 4. 75 



Orgaoic matter 14.24 



Inorgauic luatter 81.01 



100. GO 

 Specific gravity of soil, 1.14. 



The aqueous extract of the soil has an acid re-action. 



The soil itself is of very tine texture, free from stones, is very compact, 

 and becomes very hard when dried. When treated with a dilute solu- 

 tion of carbonate of ammonia, it yielded an extract which, when evapo- 

 rated to dryness and strongly heated, left a residue which contained, in 

 100 parts, the following constituents : 



Organic matter 86.950 



Silica 1.878 



Sulphuric acid 3. 421 



Magnesia 1.956 



Lime 1.434 



Peroxide of iron , 0. 913 



Phosphoric acid 0. 619 



Potash..., 2.909 



100. 080 



One hundred parts of the mineral matter remaining in the soil, after 

 exhausting with carbonate of ammonia, contain : 



Insoluble silica, sand, etc 78. 100 



Soluble silica 0. 205 



Lime 0.380 



Magnesia 0.200 



Manganese 0. 491 



Alumina , 16.843 



Peroxide of iron 2. 970 



Phosphoric acid 0. 190 



Sulphuric acid 0. 677 



100. 056 



Collecting the above results, we find that 100 parts of air-dried soil 

 contain : 



Moisture 4. 750 



Silica 0.0432 



Sulphuric acid 0. 0786 



Magnesia 0.0450 



Matter soluble in carbonate J -r,, "^ ; ."""".■, n r,-i ,-, 



,. . < Phosphoric acid 0.0142 



Ot ammonia. i r) • i *• • . n n^nn 



I Peroxide of iron ; 0. 0210 



I Potash 0.0669 



I Organic matter 2. 0000 



L 2.3019< 



f Insoluble silica, sand, etc 62. 93 



Soluble silica 0.165 



I Lime 0.307 



I Magnesia 0. 161 



Peroxide of manganese ^ 0. 395 



Peroxide of iron 2. 390 



Alumina 13.594 



Phosphoric acid 0. 153 



Sulphuric acid 0. 546 



Organic matter 12. 240 



i^ 92. 781 



100. 8315- 



Matter insoluble in carbon- 

 ate of ammonia. 



