1 55 
and naphthaline , and on a new acid produced. 
was soluble in water and alcohol, and was decomposed by- 
heat, with the general appearances already described. 
Copper. Hydrated per-oxide of copper formed an acid 
salt with the acid, and the solution evaporated in the air 
left radiated crystalline films. The dry salt when heated 
fused, burnt with flame, and exhibited the usual appear- 
ances. 
Nickel. The salt of this metal was made from the moist 
carbonate. It was soluble, crystalline, of a green colour, and 
decomposed by heat in the usual manner. In one instance 
an insoluble sub-salt was formed. 
Silver. Moist carbonate of silver dissolved readily in the 
acid, and a solution, almost neutral, was quickly obtained. 
It was of a brown colour, and a powerful metallic taste. By 
evaporation it gave a splendent, white, crystalline salt ; not 
changing in the air except when heated ; but then, burning 
with flame and ultimately leaving pure silver. When the 
solution of the salt was boiled for some time, a black insolu- 
ble matter was thrown down, and a solution obtained, which 
by evaporation gave abundance of a yellow crystalline salt. 
The changes which took place during the action of heat in 
the moist way were not minutely examined. 
Mercury. Moist proto-carbonate of mercury dissolved in 
the acid forming a salt not quite neutral, crystallizing feebly 
in the air, white, of a metallic taste, not deliquescent, and 
decomposed with various phenomena by heat. By re-solution 
in water or alcohol, and heat, a sub-salt of a yellow colour 
was formed. 
The moist hydrated per-oxide of mercury also dissolved in 
the acid, forming an acid solution, which by evaporation 
