538 Oa Liquid Manure. 



Soluble silica (soluble in caustic potash) .. .. G'75 



Insoluble silicious matter (fiue clay; .. .. 15-84 



Oxides of iron and alumina 2" 46 



Lime 6-90 



Magnesia '81 



Potash '36 



Chloride of potassioim 2*03 



Chloride of sodium 5*02 



Phosphoric acid 3 88 



Sulphuric acid 2*02 



Carbonic acid and lois • 5 J 



According to these analytical results, an imperial ofallon of the 

 muddy liquid manure from Tiptree Hall contained : — 



* Water and ammonia driven out on boilinir .. .. 09,904*24 



t Organic matters 50"19 



Mineral matters 4;j'57 



Consisting pi' — 



Soluble silica 6*47 



Insoluble silicious matter (clay) 15'17 



Oxides of iron and alumina 2*36 



Lime 6*60 



Magnesia 1*73 



Potash -35 



Chloride of potassiiini 1"95 



Chloride of sodium 4*81 



Phosphoric acid 3-72 



Sulphuric acid 1.94 



Carbonic acid and los j '47 



70,000-00 



* Containing ammonia .. 2-846 



t Containing nitrogen 2" 17 



Equal to ammonia 2.63 



Total quantity of nitrogen j)fr gallon .. .. 4"51 



Equal to ammonia 5 '476 



It will be seen that the proportion of organic matter, as well 

 as that of mineral matters, in the muddy liquid is much larger 

 than in the clear liquid. But even this additional quantity of 

 fertilising substances does not materially increase its value, for 

 the additional amount of organic matters furnishes onh'^ 1'65 

 grains of nitrogen beyond the nitrogen contained in the organic 

 substances of the clear liquid; and the additional mineral 

 matters chiefly consist of fine clay, which of course adds nothing 

 to the fertilising value of this manure. 



Since the intrinsic value of all manuring substances is mainly 

 dependent upon the amount ^f nitrogen, phosphoric acid, and 

 potash which they contain, some idea of the relative merits ol 

 these six kinds of liquid manure may be formed by comparing 

 the prf)portions of these constituents which each kind contains, 

 I have, therefore, grouped together these determinations of 

 nitrogen, potash, and phosphoric acid, as well as some other 

 data which will facilitate comparison. 



