MINERAL WATERS OF DUNBLANE. 447 



tlier less foreign matter. The ingredients, however, are the 

 same, and the difference therefore probably arises from the 

 water of the lower spring being farther diluted in its course. 

 This difference led to the analysis of tlie water of both springs. 

 It is proper to remark, that both have been submitted to exa- 

 mination after a season unusually dry. 



Analysis of the Water of the North Spring. 



The taste of this water is saline, with some degree of bitter- 

 ness. As procured from the principal pool at which it issues, 

 it is free from smell; procured, however, from some other 

 pools, at the distance only of a few feet, its smell is slightly 

 sulphureous, probably owing to impregnation from matter at 

 or immediately under the soil. Its sensible operation on the 

 system is that of a diuretic and purgative. The former effect 

 is usually obtained, when a quantity is taken by an adult, 

 from an English pint to a quart ; the latter, when more than a 

 quart is taken. The specific gravity of the water is 1.00475. 

 It suffers no change in its sensible qualities from exposure 

 to the air. 



The state of the spring is at present such, that any gaseous 

 impregnation of the water cannot be determined with preci- 

 sion. Bubbles of air frequently rise from the bottom of the 

 pool, but this is merely atmospheric air : transmitted through 

 lime-water, it produced no sensible milkiness ; nor does the 

 water appear to contain any free carbonic acid. 



The usual re-agents present with the water the following 

 appearances : 



1. The colours of litmus, violet, and turmeric, are not sen- 

 sibly affected. 



3L2 2. Muriate 



