2 On the Muriate of Soda, or Common Sait. 
the quantity of rock salt found in various parts of the globe.” 
The proportion of salt contained in the water is, with few 
exceptions, nearly the same in all latitudes. The Baltic is 
much less salt than the ocean, and contains, when an easterly 
wind prevails, only ;3,; part of saline matter. The Dead 
Sea of Palestine is an exception of the opposite kind. Ac- 
cording to Gay Lussac, one hundred parts of this water con- 
tain muriate of magnesia 15°3, muriate of soda 6°9, muriate 
of lime 4:0.} It is stated in the first volume of Rome de 
V'Isle’s Crystallography, page 375, that the salt water in the 
Baltic sea contains ;', part-of its weight of salt; that of the 
sea between England and Flanders contains j'; part; and — 
that of the coast of Spain one ounce in the pound; and that 
between the tropics one ounce and a half or even two 
ounces, viz. one-eighth of the whole. From this may be seen 
the great advantage of separating the brine of the sea wa- 
ter in cold climates by freezing before it is set over the fire 
for evaporation. 
: Rock salt is found very high above the level of the sea, as 
in the Cordilleras of America, and also in Savoy, where it 
exists at an elevation equal to that of perpetual snow. 
Salt fountains are very common in various parts of Europe 
and elsewhere, so that hardly any kingdom is absolutely with- 
out salt either in mines or springs, Salt springs are found 
in Lorraine, Alsatia, Franche-Compté and Gascony, provin- 
ces of France, in the Palatinate of the Rhine, Spire, Hesse, 
and Luneburg, in Germany ; Halle in Saxony, in Ostro- 
gothland, Westmanland, &c. &c.j From the salt springs 
at Droitwitch, in Worcestershire, sixteen thousand tons of 
salt are annually procured, and one hundred and fifty-six 
housand tons of rock salt are annually raised from the great 
eposit near Northwitch, in Cheshire. In France there are 
any salt Sw 
e- r 
.. It is abundantly diffused 
) countries of Asia, Africa, and America, 
_ The most celebrated salt mines in Europe are at Cardona 
in Spain, and im Poland. The former appears to be an enor- 
* Be ’s Mineralogy, 637.. + Cleaveland’s Mineralogy, page 128. 
% Cronsted’s Mineralogy, Vol. 1, p. 363, 
