117 



of magnesia and chloride of ammonium ; which are rarely met with 

 under these circumstances. It is to be regretted that the fluid quantity 

 of water analyzed by Dr. Schweitzer is not stated. The whole analysis 

 differs greatly from those previously published. 



Empire Spring, Saratoga. This is another of those, so called, new 

 discoveries which are every few years made at Saratoga. That the 

 proprietors of these new springs should find it to their interest to laud 

 their waters as possessing remarkable properties, is not perhaps sur- 

 prising. But a little reflection must satisfy us that there can be no great 

 difference in the composition of springs which undoubtedly have a com- 

 mon origin. 



The spring which has received the above name, was, it is said, par- 

 tially made known in 1S46, under that of New Congress Spring. Ac- 

 cording to the analysis of Dr. Emmons, the saline matters contained in 



one pint of this water, are as follows : 



• 



Chloride of sodium, - - - - 33*71 grains. 



•Bicarbonate of soda, - 3*85 " 



Bicarbonate of lime, - - - - 17*73 " 

 Bicarbonate of magnesia, - 5*25 " 



Hydriodate of soda, ... - 1-50 " 



62*04 grains. 



The peculiarities of this water are said to be the* remarkably large pro- 

 portion of hydriodate of soda, and its freedom from any salt of iron. 

 I am apprehensive, however that the proportion of iodine may be over- 

 stated in the above table, as I have been unable to detect its presence 

 by the most delicate tests, either in the raw water, or in a portion par- 

 tially reduced by evaporation. 



CLASS. II. 



LIQUID MINERALS, NOT COMBUSTIBLE. 



HYDROUS SULPHURIC ACID. 



Under the head Sulphuretted Hydrogen, I have already introduced 

 some remarks in regard to the occurrence of this acid in a dilute form, 

 in Western New- York. 



