C. A. Goessmann on the Chemistry of Brines. 83 
If such relations exist in regard to the natural saline bitterns 
of both localities, as the history of the liquid No. v suggests, 
we may be entitled to assume, considering the area of actual ob- 
servation the existence of extensive salt deposits within the Si- 
lurian basi vance here opinions in regard to their par- 
ticular origin in either case, would be of little value, so long as 
eful local examinations are still wanting; since marine evap- 
orations or salt deposits may occur independently of each other, 
between the successive strata within the same basin;* and ir- 
regularities and ruptures in the level of the rocks, caused by 
physical and chemical reactions from within and without, are 
quite frequently observed in the a of salt deposits. More- 
tion of the saline waters, No. 1, p. 80, and a and B, p. 82, which 
occur within quite a limited territory will in all probability 
find a less acceptable explanation, in the opinion of many, by 
@ 
5 
2 
e 
5 
“0g 
O 
° 
5 
& 
—- 
3 
5 
Thanges in composition due to the reaction of carbonate of 
“Magnesia upon chlorid of caleiwm and sulphate of lime in the pres- 
ence of carbonic acid gas.—On a previous occasion I described 
the mode of action and the conditions under which carbonate of 
eS independent rock salt deposits, for instance, have been found in the Thu- 
ringian basin; one in the Pariaiee seeks (Zechstein), the other in the Triassic rocks 
(Muschelkalk). (F, Bischof, Steinsalz werke bei Stassfurt. Berlin, 1864, p. 5.) 
+ At Stassfurt, a layer of magnesian compounds several hundred feet in thick- 
‘oceurs above the rock salt, while at Schonbeck (belonging to the same deposit) 
ing. (F. Bischof.) ae 
