Liquid Manure. 5 



Another portion of the filtered liquid was supersaturated with 

 hydrochloric acid, and thereby the volatile carbonate of ammonia 

 and the humates and ulmates of ammonia, which lose ammonia 

 on heating, were converted into chloride of ammonia. Evapo- 

 rated to dryness on the water-bath, the acid liquid left a residue 

 which, on burning with soda-lime, gave the total amount of 

 nitrogen in the liquid. By deducting the amount of nitrogen 

 found in the residue left on evaporation without acid from the 

 total quantity of nitrogen, and calculating the remainder as 

 ammonia, the proportion of ammonia existing as carbonate and 

 as humate or ulmate of ammonia was determined. 



A third portion of the filtered liquid was evaporated to dry- 

 ness, the residue weighed, and afterwards burned in a platinum 

 capsule at a moderate heat. The remaining ash was subsequently 

 carefully analysed, according to well-known processes that need 

 not be described here in detail. 



This ash was found to consist, in 100 parts, of 



Soluble silica '90 



Oxide of iron 3*24 



Lime 28*52 



Magnesia 1'49 



Potash 4-33 



Chloride of sodium 42*36 



Phosphoric acid '11 



Sulphuric acid 3*67 



Carbonic acid and loss .. 14*72 



100-00 



The solid matter in the liquid manure, left in contact with soil 

 for 24 hours, had the following composition : 



Organic matter 30'66 



Containing 1*62 of nitrogen. 



Inorganic matter 69*34 



Consisting of : 



Soluble silica '62 



Oxide of iron 2*24 



Lime 19*77 



Magnesia .. .. .. .. .. .. .. 1*03 



Potash .. .. . .;' ij - .. .. 3-00 



Chloride of Sodium 29*37 



Phosphoric acid *53 



Sulphuric acid 2*54 



Carbonic acid and loss 10*24 



100*00 



According to these data, an imperial gallon of liquid manure, 

 mixed in the proportion of seven parts (by weight) to two parts 

 (by weight) of soil, and filtered off after 24 hours, had the 

 following composition : 



B 2 



