COPPER. 
Sp. 14. Tartrite of Copper. 
TARTAROUS ACID has but little action on copper, 
but it dissolyes its oxide; and when poured into the sul 
a tartrite of 
phat or muriat of copper, it precipitates 
that metal in the form of blue crystals*. According 
to Leonhardi this salt forms the better kind of the pig 
ment called Brunswick green. 
Sp. 15. Triple Tartrite of Copper. 
THis salt may be obtained by boiling together oxide 
of copper and tartar in water. The solution yields by 
evaporation blue crystals which have a sweetish taste, 
and contain a great proportion of metalt. 
Sp. 16. Benzoat of Copper. 
BENzoIC ACID combines readily with the oxide of 
copper. The salt formed is in small crystals of a deep 
green colour, sparingly soluble in water, and insoluble 
in alcohol. When heated, the acid evaporates and 
leaves the oxide. The alkalies and the carbonats of 
lime and barytes decompose it 1. 
Sp. 17. Succinat of Copper. 
SUCCINIC ACID dissolves copper when assisted by a 
long digestion. The solution is green, and yielded 
Wenzel small green crystals, the properties of which 
have not been examined. 
* Bergman, iii. 456. 
+ Thenart, Ann. de Cbim. xxXxviii. 36. 
1 Trommsdorf, Ibid. xi. 315. 
VoL. II. 
K k 
513 
Chap. III.