On Liquid Manure. 19 



In the preparation of the ash the greater part of the lime, 

 which exists in the original liquid as bi-carbonate, was burned 

 caustic ; hence the small proportion of carbonic acid which was 

 found on analysis. 



The ^mineral portion of this liquid resembles in its general 

 characters that of the preceding ones. But the relative pro- 

 portions of the several constituents differ considerably from 

 those of the liquid manures from Badminton, Westonbirt, and 

 Cirencester. 



It is chiefly by a much larger percentage of lime and phos- 

 phoric acid that the Tiptree Hall sample is distinguished from 

 the others. Being prepared from solid as well as liquid excre- 

 ments, the larger amount of phosphoric acid finds a ready 

 explanation, as it occurs abundantly in the solid excrements of 

 animals, whilst it is absent in their urine. 



During the fermentation of the solid excrementitious matters, 

 insoluble combinations of phosphoric acid are rendered soluble 

 and made available for the immediate use of plants. 



On account of the more abundant occurrence of phosphoric 

 acid in this species of liquid manure, it is a fertiliser which is 

 better adapted for general manuring purposes than the liquids 

 previously examined. The solid residue left, on evaporating to 

 dryness an imperial gallon of liquid, gave on burning with soda- 

 lime *52 grains of nitrogen, equal to '63 of ammonia. 



Evaporated with the addition of hydrochloric acid, the same 

 quantity of liquid yielded on combustion with soda-lime 3*29 

 grains of nitrogen, which is equal to 3*99 of ammonia. 



The following analysis expresses the percentage composition of 

 the solid matter contained in this liquid : 



* Organic matters 26'38 



t Inorganic matters 73'62 



100-00 



* Containing nitrogen 1 78 



Equal to ammonia 2 '16 



t Consisting of 



Soluble silica 5-77 



Insoluble silicious matter (fine clay) 2*60 



Lime 15-18 



Magnesia 6'11 



Potash .. .. 4-49 



Chloride of potassium 3*79 



Chloride of sodium 18-73 



Phosphoric acid 8'10 



Sulphuric acid 7 '37 



Carbonic acid .. .. 1-48 



These analytical data lead to the following composition : 



