318 Heinrich Rose. 
neutral salt, held in solution and protected from the decompo- 
sing action of the water by the excess of free acid. By evapo- 
ration the salt can be made to crystallize; but it is then a neu- 
tral salt, and never has one of the so-called acid salts been ob- 
tained in a crystalline, or in any solid form. The separation of 
e oxyd is analogous to the precipitation of certain bases b. 
carbonate of baryta, and may be regarded, like it, as a criterion 
of the feebleness of their basic properties. That water should 
not be able to separate from the basic salt the whole of the acid, 
is not surprising; for, from the basic chlorid of bismuth, the 
strongest alkalies cannot take the whole of the chlorine.’ 
required to separate the alkaline salt. The oxyd of silver alone 
vals he was occupied with other works. This makes it im 
sible to consider his writings in strict chronological order, and 
ld h ft 
collected and re-arranged the thoughts and facts which are scat 
tered through his successive publications, as was his intention t0 
: Analogous to this is the fact that the basic sulphate of (Hg0, 803+ 
_ 2Hg0), cannot be converted into the neutral salt by digestion, eves with cone” 
__ rated sulphurié acid; only that portion which dissolves in the acid liquid, combines 
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