ME. G. GOEE 0]Sr THE PEOPEETIES OE ELECTEO-DEPOSITED ANTIMO]N"Y. SfiO 
peared, then heated with a weak solution of ammonia, and finally washed with 
distilled water until all traces of sulphuric acid were removed, and thoroughly dried at 
about 300° Fahr. Some of the oxide thus formed was reduced to the metallic state 
by fusion with cyanide of potassium. 3rd. Best commercial antimony, also electro- 
deposited grey antimony, was very finely pulverized, the powder boiled nearly to dry- 
ness with pure nitric acid, the mass well washed with distilled water, and the process 
with the acid and water repeated several times to remove iron, copper, and lead ; the 
dried residue was then heated to redness as long as vapours were evolved, and reduced 
by fusion with twice its weight of cyanide of potassium. And 4th. A hot solution of 
pure tartar-emetic was precipitated by solution of ammonia, and the resulting teroxide 
washed with abundance of hot distilled water and dried. 
80. Several depositing liquids were prepared by dissolving the purified oxide in pure 
hydrochloric acid to about two-thirds’ or three-fourths’ saturation ; using the purified 
metal as anodes, and sheets of platinum as cathodes. The oxide and metal prepared 
by the second method were used much more extensively than either of the others. 
With each depositing liquid an abundant deposit of bright black antimony was readily 
obtained in the usual manner, and the deposited metal possessed the usual structure 
and peculiar heating power, and evolved the usual vapour during the change. 
81. Analyses of two different specimens of the pure unchanged substance deposited 
from a solution composed of 3 parts of pure hydrochloric acid saturated with pure oxide 
of antimony and then 1 part more of the acid added, yielded the following results. 
The first specimen was deposited more rapidly than the second. 
No. 1. 
Sb ... 93-36 
Sb, CP . . 
H, Cl . . 0-46 i 
99-80 
No. 2. 
Sb . . . 93-51 
Sb, CP . . 6-031 
H, Cl . . 0-21 J 
99-75 
A trace of water contained in them was not estimated. 
82. The method of analysis was as follows : — a tube of German glass, nearly half an 
inch in diameter and 12 inches long, closed at one end, was bent to the annexed figure; 
the closed end was heated, and 200 grains of unchanged ^ 
antimony, in small fragments, was introduced, a single 
fragment at a time, to discharge the heat safely ; the 
metal was then gradually heated to fusion and collected in A, whilst the semisolid 
distillate collected in B ; the two were then separated by fusing the tube at C. The 
distillate was dissolved in a solution of tartaric acid, and the amount of terchloride of 
* It is worthy of remark, that grey antimony deposited in the crystalline state from the tartaric acid 
solution (2.), contains only a minute quantity of eiiclosed liquid, similar to the exclusion of impurities from 
substances generally by crystallization. 
