364 
DR. A. W. HOFMANN’S RESEARCHES INTO THE 
Calcium-salts . . 
jWhite precipitate of the hydrate of the earth, insoluble in 
1 an excess of the base. 
Magnesium-salts . 
rWhite precipitate of the hydrate of the earth, insoluble in 
1 an excess of the base. 
Aluminum- salts . 
[White gelatinous precipitate, soluble in a considerable ex- 
) cess of the base. 
Chromium-salts . 
[Greenish precipitate of the hydrated sesquioxide, insoluble 
* L in an excess of the base. 
Nickel-salts 
Cobalt-salts . . 
. . Apple-green hydrate of the protoxide, insoluble in excess. 
. . Pink hydrate of the protoxide, insoluble in excess. 
Manganese-salts . 
[Whitish precipitate of the hydrated protoxide, insoluble in 
1 excess. 
Iron-salts. 
Protoxide . . 
[Green precipitate of the hydrated protoxide, insoluble in 
t excess. 
Sesquioxide . . 
Zinc-salts . . . 
Lead-salts . . . 
Silver-salts . . . 
Mercury-salts. 
Suboxide. . . 
[Brown precipitate of the hydrated sesquioxide, insoluble 
\ in excess. 
. . White hydrate of the protoxide, soluble in excess. 
. . White hydrate of the protoxide, soluble in excess. 
. . Brown protoxide, insoluble in excess. 
. . Black suboxide, insoluble in excess. 
Protoxide . . 
[Red precipitate, probably of a double salt, becoming yel- 
L low protoxide by addition of excess. 
Copper-salts . . 
[Blue hydrated protoxide, insoluble in excess, becoming 
1 black by ebullition. 
Cadmium-salts 
Bismuth-salts . . 
Antimony-salts 
(Teroxide) . . 
Tin-salts. 
Protoxide . . 
Binoxide . . . 
Gold-salts . . . 
. . White hydrated protoxide, insoluble in excess. 
. . White hydrated teroxide, insoluble in excess. 
jwhite hydrated teroxide, soluble in excess. 
. . White hydrated protoxide, soluble in excess. 
. . White hydrated binoxide, soluble in excess. 
. . Yellow precipitate of the double compound. 
Platinum-salts. . . . Yellow precipitate of the double compound. 
It is evident that the salts of the metals, with the exception of those of chromium, 
whose oxide does not redissolve in an excess of the base, exhibit the same reactions 
with potassa and oxide of tetrethylammonium. 
Although I did not anticipate great results from the experiment, I have submitted 
the new base to the action of the galvanic current, the pile being disposed as in 
Berzelius’s original experiment on the formation of the ammonium-amalgam. 
