66 Mr Rose on the Composition of 



to experiment, sufficed nevertheless to shew to how small a pro- 

 portion the entrance of the Volga reduces the salt in the water 

 at the northern part of this sea. The specific gravity, at 54° 5' 

 Fahr., was only 1,0013, and one hundred parts of water gave, 



Chlorine, . . 0,0455 



Sulphuric Acid, . 0,0258 



Lime, . . 0,0176 



Soda, . . 0^0418 



Magnesia, .. 0,0160 



0,0455 of chlorine, combined with 0,0299 of sodium, the re- 

 maining 0,0016 of soda with 0,00205 of sulphuric acid ; 0,02375 

 of sulphuric acid was then combined in the water in the form of 

 gypsum, with 0,0169 of lime, so that 0,0007 of hme + 0,016 

 magnesia, were dissolved as bicarbonates. In 100 parts, then, 

 of water, are dissolved— 

 Chloride of Sodium, 



Sulphate of Soda, 



Sulphate of Lime, 



Bicarbonate of Lime, 



Bicarbonate of Magnesia, 



Water, with a very small quantity of organized matter, 



0,0754 

 0,0036 

 0,0406 

 0,0018 

 0,0440 

 99,8346 



100,0000 



The salts obtained by evaporation in a bottle of water, ob- 

 tained near Astracan by the brother of Mr Rose, contained a 

 much less proportion of sulphuric acid, as well as of lime and 

 magnesia, the reason of which was, that during the evaporation, 

 the earthy carbonates, as well as a great part of the gypsum, 

 were precipitated, and could not easily be removed from the ves- 

 sel. On the first action of the heat, the salt became black, and 

 sank to the'^bottom ; and 0,670 of a scruple, heated to a high 

 temperature, afforded to Mr Rose 0,1275 of a scruple of sul- 

 phuric acid, 0,2593 of chlorine, 0,0549 of lime, 0,2320 of soda, 

 and 0,0500 of magnesia. These parts formed, in the salt in the 

 state of fusion, the following combination : — 



0,6652 



