C. A. Goessmann on the Chemistry of Brines. 87 
of soda provided the latter does not exceed in chemical equiv- 
alents the chlorid of calcium and sulphate of lime present, sul- 
phate of soda, and carbonate of lime being formed in both in- 
stances; they differ only in one essential point; in case of the 
addition of carbonate of soda the chlorid of calcium is simpl 
nesia the chlorid of calcium is replaced by a corresponding 
uantity of chlorid of magnesium. The following statement 
monstrates the changes = to the addition of an amount of 
carbonate of magnesia or of carbonate of soda chemically equal 
to the amount of chlorid of calcium present, since, as soon as 
that point is passed both carbonates produce sulphates of soda, 
as long as sulphate of lime remains in excess. 
1. 2, 3. 
Sulphate of lime, ‘ . 05772 05772 0°5772 0°7652 
Chlorid of calcium, . . 015383 ety Pees popeset 
e magnesium, . 0°1444 02756 071444 071444 
potassium, . . 00119 0°0119 0°0119 00119 
Bromid of magnesium, . 0°0024  0°0024  0°0024  0-0024 
Chlorid of sodium, . 155317 155317 156933 15°6933 
— . 83°57 83°57 
Carbonate of lime, sp 01381 0°1881 
1 represents the original brine; 2 represents this brine treat- 
ed with the necessary amount of carbonate of magnesia; 
“ 
centration before or after such changes as we have discussed in 
to react decidedly upon percolating 
yracuse, March 14, 1867. 
