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position is going too far ; for this indicates that vola- 

 tile alkali is disengaged. 



When dung is to be preserved for any time, the 

 situation in which it is kept is of importance. It 

 should, if possible, be defended from the sun. To 

 preserve it under sheds would be of great use j or to 

 make the site fa dunghill on the north side of a wall. 

 The floor on which the dung is heaped, should, if pos- 

 sible, be paved with flat stones ; and there should be 

 a little inclination from each side towards the centre, 

 in which there should be drains connected with a 

 small well furnished with a pump, by which any fluid 

 matter may be collected for the use of the land. It 

 too often happens that a dense mucilaginous and ex- 

 tractive fluid is suffered to drain away from the dung- 

 hill, so as to be entirely lost to the farm. 



Street and road dung, and the sweepings of homes 

 may be all regarded as composite manures, the con- 

 stitution of them is necessarily various, as they are 

 derived from a number of different substances. These 

 manures are usually applied in a proper manner, with- 

 out being fermented. 



Soot 9 which is principally formed from the com- 

 bustion of pit coal or coal, generally contains likewise 

 substances derived from animal matters. This is a 

 very powerful manure. It affords ammoniacal salts 

 by distillation, and yields a brown extract to hot wa- 

 ter, of a bitter taste. It likewise contains an empy- 

 reumatic oil. Its great basis is charcoal, in a state in 

 which it is capable of being rendered soluble by the 

 action of oxygene and water* 



