334 Wisconsin Academy of Sciences, Arts, and Letters. 
action when HOI was present. Ho gas was evolved upon any 
metal. Oalcite and witherite were not acted upon. See sum¬ 
mary in Table* I. 
2. A second sample of SbCl 5 w 7 as treated as in Method 1. 
The pure solvent acted upon iron, coating it red; upon tin, 
forming a white crust. Bismuth, copper, antimony and tellu¬ 
rium were darkened; arsenic turned gray. Magnesium, alu¬ 
minum, chromium, manganese, zinc, nickel, cadmium, silver, 
gold, platinum, and palladium were not acted upon, as was the 
case in Experiment 1 above. When the HOI gas was run in, 
the corrosion on the iron was increased slightly. Ho further 
action was observed on any of the metals except silver, which 
was blackened. By a separate experiment it was shown that 
no silver goes into solution in this antimony pentachloride and 
HOI solution. A qualitative analysis of this solution showed 
mere traces of lead, cadmium, iron, zinc and magnesium. A 
large quantity of the solution was operated upon—10 cc—so 
that the test shows that the solubility of chlorides of the* metals 
found is extremely slight. By another experiment it was 
shown that silver may be kept indefinitely without blackening 
in a solution of EGO in SbC : l 4 provided no other metal be pres¬ 
ent. This means that we have here a case of plating out of 
one* metal upon another from a solution which is as non-conduct¬ 
ing towards the electric current as a dry air-gap. Oalcite and 
witherite were not attacked. Ho bubbles, of gas were given 
off from any of the metals. This may be explained by assum¬ 
ing that nascent hydrogen reduces, the Sb01 5 regenerating HC1 
which dissolves in the solvent. 
Sulphur Monochloride as Solvent. —Bchuchardt’s S 2 C1 2 was 
treated as described, in method 1. The pure solvent blackened 
antimony immediately; copper is blackened and tellurium 
turned dark. Magnesium at first was coated a yellowish white 
and aften ten minutes the action upon the magnesium became 
so violent that sufficient heat was generated to crack the bottle 
containing the solvent and the metals. A separate experiment 
showed that magnesium alone acts upon S : 2 C1 2 when both are 
dry giving free sulphur and the chloride of magnesium. 
