On the Chemical Properties, of Soils. 21 



ascertained by weighing, the amount of ammonia in it calculated, 

 and 7000 grains of solution No. 1, containing 4'438 grains of 

 ammonia added. 



The quantity of liquid left in the bottle was 2070 grains, and 

 contained '298 grains of ammonia, the fresh quantity of stronger 

 solution added 7000 grains, containing 4*438 grains. 



The total solution weighed 9070 grains, and contained 4' 7 36 

 grains of ammonia ; 1000 grains of this solution, therefore, 

 contained '522 grains of ammonia. After standing for four 

 days, the liquid was drawn off and the strength determined as 

 before. This solution contained '320 grains of ammonia. 



Ammonia. 

 Grains. 



Before contact with soil 1000 grains of solution contained "522 

 After contact ,, ,, *320 



202 



Thus '202 grains of ammonia were removed from every 1000 

 grains of solution. From the whole solution (weighing 9070 

 grains) consequently 1 '83214 were removed and retained by the 

 soil (1750 grains), which had already taken up 1'120 grains from 

 the weaker solution. 



Ammonia. 

 Grains. 



1000 grains of soil therefore absorbed in the 2nd Experiment 1*047 

 And had previously absorbed '640 



1-687 



Or 1000 grains of soil absorbed from both solutions 1'687 grains 

 of ammonia. 



In a similar manner the following experiments were made : 



Experiment 6. 



There was added to the contents of the bottle used in Experi- 

 ment No. 3, 5000 grains of solution No. 2, containing '304 grains 

 ammonia in 1000 of liquid. 



Ammonia. 

 Grains. 



Before contact with soil 1000 grains of the mixed solutions) .007 

 contained t * 



After contact with soil 1000 grains of the solution contained '127 



110 



Therefore '110 grains were removed from every 1000 grains of 

 liquid, or '836 grains from entire solution, and retained by 1750 

 grains of soil, which had already taken up '455 grains from the 

 weaker solution. 1000 grains of soil therefore absorbed in 2nd 

 Experiment '477 grains, in addition to '260 grains absorbed from 

 the weaker solution, or from both solutions *737 grains of am- 

 monia were removed and retained by 1000 grains of soil. 



