18 On Liquid Manure. 



collected in 1858 was more considerable than in the ash of the 

 liquid collected in 1857. 



At different periods the liquid manure obtained on the same 

 farm thus exhibited marked differences in composition, which 

 differences cannot fail to influence the effects which it is capable 

 of producing in the field. 



The large proportion of salt in the liquid collected in 1858 I 

 am inclined to think owes its origin to a heap of refuse salt 

 which had been purchased at a very cheap rate. In all proba- 

 bility, some of this salt had, by some means or other, found its 

 way into the tank. 



5. Liquid Manure from Tiptree Hall, Essex. 



I am indebted to Mr. Mechi for kindly supplying me with 

 the material of which the subjoined two analyses were made. 

 Mr. Mechi keeps the greater part of his stock on boards, and 

 collects the solid and liquid excrements together in a large tank. 

 Before distributing the contents by means of steam-power and 

 underground pipes it is much diluted with water. 



The tank-liquid from Tiptree Hall possessed a strong smell 

 and had a dark muddy appearance. A portion of the well- 

 shaken liquid was allowed to subside, and the clear portion 

 examined separately. This clear liquid had a light yellowish 

 colour, and gave a very faint ammoniacal reaction with red 

 litmus paper. 



An imperial gallon gave on evaporation to dry ness 29*19 grains 

 of fixed residue dried at 212 Fahr. 



On burning, this residue left 21 '49 grains of ash. 



A gallon thus contained : 



Water and volatile matters . . 69,970*81 



Organic matters 7*70) 29*19 



Inorganic matters 21*49) fixed residue. 



70,000-00 



The inorganic portion, on analysis, was found to consist in 100 

 parts of 



Soluble silica 7*84 



Insoluble silicious matter (fine clay) .. .. 3' 54 



Lime 20*62 



Magnesia 8'31 



Potash 6*11 



Chloride of potassium 5*16 



Chloride of sodium 25*45 



Phosphoric acid 11*01 



Sulphuric acid 10*02 



Carbonic acid .. T94 



100*00 



