614 



Miscellaveous Results from the Laboratory. 



The analysis was made in my laboratory by Mr. F. Eggar: — 



Grs. of solid residue. 

 One gallon of the liquid manure gave upon evaporation . 1208*42 



of which 



Grains. 



The combustible portion vireighed 397-63 



The incombustible portion, or as/i 810*79 



The combustible portion consists principally of carbonate and muriate 

 of ammonia, with some unchanged animal matters. To ascertain the pro- 

 portion of ammonia — the only point considered of importance in the com- 

 bustible portion — two experiments were made by distillation of the 

 original liquid with potash, the ammonia being collected in the usual 

 way. 



Tlie first experiment gave 

 The second ,, 



Grs. of Ammonia 

 in the Gallon. 

 . 362 -33 

 . 350-58 



The mean of the two results giving 356*45 grains of ammonia as the 

 quantity in an imperial gallon. 



The ash was analyzed in the usual way. I have placed in one column 

 the per centage composition of the ash, and in another the quantities of 

 the different mineral substances which exist in a gallon of the tank- 

 water : — 



Silica 



Phosphoric Acid .... 



Sulphuric Acid 



Carbonic Acid 



Lime 



Magnesia 



Peroxide of Iron .... 



Potash 



Soda 



Chloride of Potassium , 



Chloride of Sodium 



Sand, &c. (accidental impurity) 



Total .... 



In 100 parts 

 of the Ash. 



99*85 



In a gallon 



of the 

 Tank- Water. 



810-74 



In addition to the chlorine, set down in combination with potassium 

 and sodium, another portion escapes in the preparation of the ash with the 

 ammonia. 



A direct determination of chlorine was made in the original liquid, 

 which gave an excess of 98*84 grains in a gallon of this ingredient over 

 that obtained by the method of burning. 



The first column of the preceding table is interesting on more than one 

 account. It will be seen that the chief ingredients of tank-water (setting 

 aside the ammonia) are the sulphate and carbonate of potash and com- 

 mon salt, the latter obviously derived from the turnips or mangold-wurzel, 

 which form the staple of the food of cows. (See Analyses of Turnips, &c., 

 in this Journal, vol. viii., part i.) 



Phosphoric acid is a very minute ingredient of the liquid manure ; 

 indeed, in the examination of pure cow's urine, some chemists of great 

 authority have been unable to detect it at all ; and Baron Liebig has as- 



