56 T. S. Hunt on Lime and Negrete Salts. 
§ 85. Without farther analysis it would be pevoreens to at- 
tempt to fix the composition of this double carbona he 
conditions under which it is generated are precisely nga of the 
drated neutral carbonate of magnesia, and it is therefore not 
and saa, tuk ite, has a similar formula, C, CaNaO ,,5H0, 
and that it may be arti ficially formed by a rocess which recalls 
crystalline double salt, (Jour. fur prakt. Chimie, xcili, 339). 
. In another experiment a portion of the solution of the 
chlorids of calcium and magnesium in equivalent portions, was 
by accident mixed with a quantity of carbonate of soda insuf 
cient for its complete (ee The mixture was ses 
I. Il. 
Carbonate - lime, - - 51°30 50°52 
magnesia, - - 29°97 30-09 
Water, by Pie . 18°73 19°39 
100°v0 100.00 
The ratios deduced from the above are nearly ten a - 
oe seven atoms of magnesia, and twen nty-one of water. 
ese results it is pas aren 2: to construct a simple formula, and 
