86 MANURES. 



the proximate constituents of this soil are present in an advanced 

 state of decomposition. In the following tabular statement, the 

 minute chemical composition of the same soil is given : 



II. Chemical Analysis. 



Moisture, 3.45 



*Organic matter, and water of combination, 13.94 



fCarbonate of lime, .31 



fSulphate of lime, .53 

 (Containing S. 0.3 .31) 



Alumina, 14.74 



Oxide of iron, 5,81 



Magnesia, .18 



Potash, (in a state of silicate) .25 



Chloride of sodium, .11 



Phosphoric acid, combined with iron and alumina (equal to 



bone earth, 131) .061 



Soluble silica (soluble in dilute potash) 1.42 



Insoluble silicious matters, (almost entirely white sand) 53.32 



100.181 

 *Containing nitrogen, .192 



Equal to ammonia, .228 



5,000 grains of this soil were mixed with 5,000 grains of liquid 

 from a fresh manure heap, and 5,000 grains of distilled water. 

 After twenty-four houi's, the clear liquid was filtered from the 

 soil, and found to be somewhat lighter colored than before ; but, 

 in comparison with the decolorizing properties of the clay soils, 

 used in the experiment, with the drainings from rotten dung, its 

 effect upon the dark-colored organic compounds in the liquid, 

 appeared to be weak. 



A portion of the filtered liquid was used for the determination 

 of the ammonia contained in it, in the form of volatile salts, or, at 

 any rate, in the form of salts, which yield ammonia on boiling their 

 watery solution. 



Another portion was evaporated to dryness, and the amount of 

 nitrogen in the dry residue determined. The rest of the liquid was 

 used for the determination of solid matter and ash. 



Leaving unnoticed the details of these various determinations, 



t Containing together .39 of lime. 



