DISTRIBUTION OF AMMONIA. 



275 



I may add also an inquiry which I made previous to 

 using the method just given. It will show the absorption 

 of ammonia by water in various situations. It shows also 

 that it is ammonia more than the decomposed matter which 

 collects and thus gives an index to the amount of matter 

 decomposed. Of course the ammonia comes, as a rule, 

 from the decomposing matter, except in places where coal 

 is burnt^ when there is that additional source. 



Absorption of Ammoniacal Substances from Air near the 

 ground and other places by pure water 2ilaced in a basin 

 under a bell jar. 



[loo cubic centimetres of pure water, with a superficial area of 10-27 inches, 

 were used for each experiment. These experiments were made during 

 the year 1875.] 



t2 



