C. A. Goessmann on the Chemistry of Brines. 85 
A. B Cc. D 
Sulphate of lime, .. . 05772 0°5772 0°2885 ee 
“ of soda, at eae < as 02900 0°5912 
‘of potassa, Saget . 00139 00139 
Chlorid of calcium, « 01588 iis nie ‘cae 
“of magnesium, . 0:1444  0°2756 04772 06786 
‘of potassium, - 00119 00119 ise es 
Bromid of magnesium, . 0:0024  0:0024  0:0024  0-0024 
Chlorid of sodium, . .15°5317 15°5317 15,3028 15-0445 
gas; this amount of carbonate of magnesia is equivalent to the 
chlorid of calcium present; C repfesents the same brine after 
> reaction of 0:2943 carbonate of magnesia, causing besides 
the removal of chlorid of calcium also that of one half of the 
Sypsum present; it changes chlorid of potassium into sulphate 
of potassa and leaves besides a corresponding excess of sulphate 
of soda. D represents the brine after the entire decomposition 
of the chlorid of calcium and the sulphate of lime; the latter is 
represented by sulphate of soda in solution, formed of course 
partly at the expense of the chlorid of sodium; 0°4725 neutral 
carbonate of magnesia, aided by carbonic acid gas, are requii 
to cause such complete changes. The whole amount of lime 
as chlorid and sulphate in the original brine is changed into 
The carbonate of lime formed during each stage of progress 
has been noted separately ; the Jargest proportion, in instances 
like those presented above, would settle soon after its formation, 
Since the degree of its solubility in this case depends upon the 
Concentration of the saline liquid, the temperature and the time 
of its formation, leaving the particular influence of the carbonic 
act means of solution out of consideration. 
Rotice 
brines, D, 
Accepting on the other hand, the fact that such changes are go- 
that the saline matter of the Silurian ocean may even change 
within the Silurian rocks to such a degree as to resemble those 
wances for influences of temperature, and concen- 
for the peculiar view n in regard to chemical 
