Y4 MANURES. 



rated to dryness, 7,000 grains furnished 65.21 grains of solid mat- 

 ter, dried at 212° Fahrenheit ; or one imperial gallon was found 

 to contain 625.10 grains of solid matters. On heating to redness, 

 65.21 grains left 36.89 grains of ash. This ash was submitted to 

 detailed analysis, and calculated for one imperial gallon of the 

 drainings. According to the analytical results obtained in these 

 different determinations, an imperial gallon of these drainings con- 

 tained — volatile and combustible constituents, 395.66. 



Ammonia driven out in boiling, 36.25 ) „ 



Ammonia, in the state of salts, de- [> ^ 



composed by quick lime, 3.11 ) 



Ulmic and humic acid, 125.50 



Carbonic acid, expelled on boiling, 88.20 



Other organic matters (containing 3.59 of nitrogen) 142.60 



395.66 



Cineral matters (ash), 368.98, viz : 



Soluble silica, 1.50 

 Phosphate of lime, with a little phosphate of iron, 15.81 



Carbonate of lime, 34.91 



Carbonate of magnesia, 25.66 



Sulphate of lime, 4.36 



Chloride of sodium, 45.70 



Chloride of potassium, 70.50 



Carbonate of potash, 170.54 



368.98 



Total per gallon, 764.64 



These analytical results suggest the following remarks : 

 1. It will be seen that these drainings contain a good deal of 

 ammonia, which should not be allowed to run waste. 



2 They contain also phosphate of lime, a constituent not present 

 in the urine of animals. The fermentation of the dung-heap thus 

 brings a portion of the phosphates contained in manure into a sol- 

 uble state, and enables them to be washed out by any watery 

 liquid that comes in contact with them. 



3. Drainings of dung-heaps are rich in alkaline salts, especially 

 in the more valuable salts of potash. 



4. By allowing the washings of dung-heaps to run to waste, not 

 only ammonia is lost, but also much soluble organic matter, salts 

 of potash and other inorganic substances, which enter into the 

 composition of our crops, and which are necessary to their growth. 



