Bonnmgton Watery near Leith, Scotland. 307 



It will be seen, however, that the total amount of all the in- 

 gredients in an anhydrous state obtained at 1, by the analysis 

 of the earthy bases existing in the soluble salts, amounted to 

 30*580 grs. ; deducting the above amount, 26-195 grs., there 

 remains 4*385 grs. carbonate of soda, which is left unchanged 

 of that quantity of carbonate of soda which was originally 

 added to the mineral water when evaporated. If the soda 

 added to 16 troy ozs. of the water be now deducted from the 

 whole amount of the soda obtained by calculation, the exact 

 quantity of soda existing in the water will be then ascertained. 

 7*047 grs. of sulphate of soda = 3*088 soda. 

 1*106 ... carbonate of soda = 0*648 ... 

 15*798 ... chlorideof sodium = 8*418 ... 

 0*006 ... iodide of sodium = 0*001 ... 

 0*069 ... bromideof sodium = 0*021 ... 

 4*385 ... carbonate of soda = 2*569 ... 

 Total . 14-745 grs. 

 Carbonate of soda added 20*11230 grs. = soda 11*782 ... 

 Leaving for soda existing in 16 troy ounces 



of mineral water 2*963 ... 



According to the foregoing analysis, the following soluble 

 ingredients are obtained in 16 ounces troy of the water: — 



grs. 

 Potassa .... 1'167 



Soda 2*963 



Magnesia ... 0*011 

 Sulphuric acid . . 4*950 

 Nitric acid . . . 1*122 

 Iodine .... 0*005 

 Bromine . . . 0*053 

 Chlorine . . . 9*533 

 Total . 19*804. 



II. Anali/sis of the Earthy Ingredients. 



By separating the soluble ingredients from the earthy car- 

 bonates, the precipitates A and B were obtained, and also an 

 acid fluid C, which was boiled with an adequate quantity of 

 carbonate of soda, the precipitate thrown down, well-lixiviated, 

 placed in conjunction with A and B in a platina crucible*, 

 and submitted to a temperature of 280^ to 300° F. until 



* Every filter was dried in a platina crucible at 212° F., cooled over 

 siilphuric acid, and its weight quickly taken in the same well-covered cru- 

 cible. Where the nature of the precipitate or other circumstances did not 

 admit of the combustion of the filter, I found it in most cases advantageous 

 to remove the contents of the filter, still half-moist, into a crucible, and to 

 wash the last traces from the filter with a washing bottle. 



Y2 



