524 On Liquid Manure. 



salts of ammonia. By deducting the amount of nitrogen foun<l 

 in the residue obtained on evaporation without acid from the 

 residue obtained with acid, and calculating the remainder as 

 ammonia, the proportion of ammonia existing as carbonate and 

 as humate and ulmate of ammonia was ascertained. 



The mineral portion left on burning the residue was carefully 

 analysed according to the best and most recent methods, which needi 

 not be mentioned here in detail. 



According to the sev^eral results obtained in the analysis, ari 

 imperial gallon of liquid manure from Westonbirt, Tetbury, 

 Gloucestershire, contained: — 



Ammonia driven out on boiling (chiefly in the shape ofi 



volatile carbonate and some as humate and ulmate of I 108'36 



ammonia) ) 



* Organic matters and non-volatile ammoniacal salts .. .. 155"44 



* Containing 4 ■ 78 grains of nitrogen. 



Mineral matters (ash) 262-81 



Consisting of — 



Soluble silica 2-49 



Oxide of iron -TO 



Lime 5*34 



Macjnesia 2'96 



Potash 103-23 



Chloride of potassium 72'00 



Chloride of sodium IT'lB^ 



Phosphoric acid 2*70 



Suh>huric acid 22-31 



Carbonic acid and loss 33-90 



Totar 52G-G1 



An imperial gallon of this liquid thus contains: — 



Total amount of mineral matters 262-81 



,, non-volatile combustible matters .. 155-44 



„ nitrogen 94*02 



AVliich is equal to ammonia 114-16 



It will be seen that the proportion of ammonia in this descrip- 

 tion of liquid manure is very considerable. It is indeed very 

 much greater than in any other kind which I have examined. 

 We may therefore expect that it will produce a powerful effect,. 

 more especially upon grass-land. But as carbonate of ammonia 

 is a caustic agent, and acts too energetically when applied 

 to a standing crop in a liquid so rich in ammonia as the tank 

 liquid i'rom Westonbirt, a considerable quantity of water — 

 say three times the bulk of water — should be added before 

 the liquid can be applied with safety. It will likewise be 

 noticed that nearly the whole of the nitrogen which originally 

 existed in the urine of horses in the state of urea had been 



