On Liquid Manure. 17 



Magnesia 2-57 



Potash 15-06 



Chloride of sodium 36-07 



Chloride of potassium 2"45 



Phosphoric acid 4'32 



Sulphuric acid 3'52 



Carbonic acid 5*26 



Calculating the preceding results per imperial gallon, we 

 have in the tank-liquid from the College farm, Cirencester, col- 

 lected in 1858, the following proportions of the various con- 

 stituents : 



Ammonia (in the state of carbonate and humate) . . . . 35*58 

 Organic matters 20*59 



Containing 1 49 of nitrogen. 

 Equal to 1-81 of ammonia. 



Inorganic matters (ash) 91-27 



Consisting of 



Soluble silica 2-34 



Lime 11-48 



Magnesia 2'87 



Potash 16-92 



Chloride of potassium 2 -74 



Chloride of sodium 40'35 



Phosphoric acid 4'83 



Sulphuric acid 3'94 



Carbonic acid and loss 5 '80 



147-44 



A comparison of the liquid manure from Cirencester with the 

 preceding kinds examined will show that there is a great deal 

 more solid matter contained in solution in the samples from 

 Westonbirt and Badminton ; that there is more ammonia in that 

 from Westonbirt than in that from Cirencester, but that the 

 latter contains more ammonia than the Badminton manure. 



It will also be observed that chloride of sodium enters more 

 largely into the composition of the liquid from the College farm, 

 and also that it contains more phosphoric acid and less potash 

 than the preceding liquids. 



Comparing the composition of the Cirencester sample col- 

 lected in 1857 with that collected in 1858, it will be seen that 

 in 1858 this tank-liquid contained less than half the quantity 

 of organic matters that were found in it in 1857, but that in 

 1858 it was somewhat richer in ammonia. 



On the other hand, the proportion of mineral matters in 1858 

 was larger than in 1857, and the percentage of phosphoric acid 

 and chloride of sodium in the mineral portion of the liquid 



