MINERAL WATERS OF DUNBLANE. 475 



whole quantity of sulphate of lime thus collected amounted to 

 5.8 grains, and of course increased the former quantity of 

 19 to 24.8 grains. Supposing the quantity of sulphate of 

 lime originally contained in the water, or, what is the same 

 thing, capable of being produced, in its evaporation, from its 

 own ingredients, to amount to 3.8 grains, this leaves 21 grains 

 formed by the action of the sulphate of soda which had been 

 added on the muriate of lime; and this is equivalent to 17.1 

 grains of muriate of lime. The saline matter obtained by eva- 

 poration of the solution, weighed after exposure to a red heat 

 44.4 grains. Of this, supposing it to be all muriate of soda, 

 18 grains would be formed by the action of the sulphate of so- 

 da on the muriate of lime ; and there remain 26.4 grains as the 

 quantity which the water had contained. This quantity is ra- 

 ther larger, and that of muriate of lime rather smaller than 

 what are obtained by the other analyses. But the saline matter 

 was found not to be entirely muriate of soda ; its solution be- 

 came turbid on the addition both of muriate of bary tes, and of 

 oxalate of ammonia, indicating the presence of sulphuric acid, 

 and of lime, either in the state of sulphate of lime, retained in 

 solution, or of muriate of lime and sulphate of soda, remain- 

 ing undecomposed. An excess of sulphate of soda of 0.9 

 grain, it has already been stated, had been employed, which 

 reduces the weight of the salt to 25.5 grains ; and if a little 

 more be subtracted on account of the lime it contained, and 

 be added to the muriate of lime, it will give proportions near- 

 ]y the same as those before assigned ; and the results by this 

 method will thus correspond with those by the others. 



Having stated this view of the composition of this water, I 

 have now to consider it under a more general light, and to 



point 



