C. A. Goessmann on the Chemistry of Common Salt. 79 
from a gaseous to a solid condition, we may assume that the 
formation of chlorid of sodium took place mainly during the 
last stages of its consolidation, at a period when the more 
volatile elements reacted upon each other, in consequence 
‘ caused the oxydation of numerous chlorids and sulphids, 
the acids of sulphur and of chlorine which thence resulted 
tive rocks, their : redominance 
in them of silicic acid, in connection with the probable character 
ig Oe a ee ae as ae i 
és on ee aC ese 
es PR oi ae oe 
! b 
i and Series of hydrochloric seid 
th this p 
