a ee eee nae eee ey Coos tet rt eo Pi BER ey EN 
T. S. Hunt on Lime and Magnesia Salts. 51 
the liter. 
§ 76. This increased solubility was explained by the fact of a 
as one or the other sulphate was employed (§ 10-19). 
77. It was further found that when such a solution contain- 
ing sulphate of lime and bicarbonate of magnesia was slowly 
evaporated at temperatures of from 80° to 70°C., the lime 
was deposited as crystalline gypsum, mixed with more or less 
carbonate, while the more soluble bicarbonate of magnesia was 
esia. 
§ 78. It was evident that in this newly discovered reaction 
between solutions of bicarbonate of lime and sulphate of mag- 
nesian limestone. Before, however, inquiring into the condi- 
tions under which this double carbonate may be formed, some 
experiments were undertaken to determine the relative solubili- 
ties of carbonate of lime, dolomite and magnesite in dilute 
acetic acid at different temperatures. It was found that this re- 
at a temperature of 4 
§$ 28, 29, it was evident that, although dolomite was not quite 
liquid containing only three per cent of acetic acid attacks pure 
carbonate of lime with lively effervescence at 16°C., and even 
