Bonnington Water ^ near Leith^ Scotland. 313 



pregnated with ammonia and these organic acids, produced 

 by tlie decay of vegetable matter. 



The result of the analysis gives the following binary com- 

 binations in 16 ox. troy of the water: — 



Anhydrous ingredients. 



in lOOOgrs. 



Sulphate of potassa 2-15838 0-28104 



soda 1-32389 0-17238 



lime 5-49913 0-71603 



Iodide of sodium 0*00637 0-00083 



Bromide of sodium 0*06900 0*00899 



Chloride of ammonium . . . 8*31609 1*08281 



sodium 3*35254 0-43653 



magnesium . . . 2*73148 0*35566 



Nitrate of soda 1*76972 0*23043 



Carbonate of magnesia . . . 1*49118 0*19417 

 Proto-carbonate of iron . . . 0*05080 0-00662 



manganese . 0*01343 0*00175 



Ammonia (united to organic matter) 0*37017 0*04820 



Alumina 0*01970 0*00256 



Silica 0*16330 0*02126 



Total in grs. .27*33518 3*55926 

 If the total amount calculated upon 1000 grs., namely, 

 3*559grs. is compared with that obtained by the evaporation of 

 1000 grs. — 3*7 12 grs. — we find a deficiency of 0*1 53 gr., which 

 belongs to the organic matter ; yet it is to be observed, that the 

 amount 3*712 cannot be very exact, as during evaporation a 

 small proportion of ammonia must have been dissipated. To 

 prove if the results of the analysis of the fixed bases are cor- 

 rect, they were computed to sulphates and compared with the 

 result obtained by evaporating 1000 grs. of the water, igniting 

 the residue to a red heat, and mixing it with a due quantity 

 of sulphuric acid, and again igniting it until the surplus of 

 sulphuric acid was dissipated, when it yielded 2*663 grs. 



Changing in this way the fixed ingredients into sulphates, 

 by computation we have — grs. 



Sulphate of potassa 2*158 



soda 6*930 



Ume 5-499 



magnesia .... 5*569 



alumina 0*065 



Proto-sulphate of iron .... 0*067 



manganese . . 0021 



Silica 0*163 



Total . . . 2ol^ 

 This amount gives upon 1000 grs. 2*665, a result very close 



