472 ANALYSIS OF THE 



very nearly equivalent to each other with regard to the pro- 

 portions of their acid and base ; so that the quantity of the one 

 may nearly be substituted for that of the other ; 3.5 of sulphate 

 of lime being equal to 8.7 of sulphate of soda. But this sul- 

 phate of lime is formed at the expence of a portion of muriate 

 of lime, and its formation is accompanied with the production 

 of a little muriate of soda ; hence the proportion of the former 

 must be a little larger, and that of the latter a little smaller, 

 than have been before stated. 3.5 grains of sulphate of lime 

 are equivalent to 2.8 of muriate of lime, which quantity, there- 

 fore, is to be added to the proportion above assigned. The 

 equivalent portion of muriate of soda to be subtracted is 3. 

 The whole proportions, therefore, will be the following : 



Muriate of soda., 



2L grains 



Muriate of lime, 



20.8 



Sulphate of soda, 



3.7 



Carbonate of lime, 



0.5 



Oxide of iron, 



0.17 



46.17 



The quantity of sulphate of lime obtained in the analysis of 

 the Pitcaithly water, being so much smaller than that in the 

 Dunblane, it may perhaps be considered as an original ingre- 

 dient ; or if even the opposite view be adopted, the change in 

 the proportions, as indicated by the analysis, is much less. 

 They may be stated as follow : 



Muriate of soda, - 12.7 grains. 



Muriate of lime, - 20.2 



Sulphate of soda, - 0.9 



Carbonate of lime, - 0.5 



The 



