C. A. Goessmann on the Chemistry of Common Salt. 88 
part ; in either case the solution may or may not be — 2 
; : t 
at Stassfurth, The conditions which have now been given 
may suffice to explain to us the t variations we notice in 
the chemical composition both of rock salt and of brines; they 
may also serve as a suitable illustration of the great risk we 
incur, when we assume to draw conclusions of an absolute 
character from the geological formation in which the salt deposit 
been found, as to the chemical composition of the oceanic 
warers of that geological age. He 8 
With these preliminary remarks upon the origin of chlorid of 
Sodium and its iated salts, I on to consider the main 
its associa ‘ts, 1 pass “aa 
Sources of supply of common salt, with parti to 
those of this doiantee igh | 
on leading sources of supply for — manufacture of salt 
already stated, three in number, Rock salt, brines, anc 
Searwater A. weelre From what has been said it is manifest 
that rock salt from different localities may differ widely, both in 
* As the ‘ ‘ isiana, for example, and most likely 
tid ao on ee es es ‘or 
