132 Mr. E. Solly on the Conducting Power of 
that pure water is also one; but that a solution of bromine or 
chlorine in water is a good conductor. A solution of iodine 
in zther also allowed the transmission of electricity, but in a 
less degree. 
5. Iodine is soluble in carburet of sulphur, forming a fine 
pinkish red solution; when boiled in it, a considerable quan- 
tity is dissolved, which, upon cooling, is again deposited in 
crystals: neither the hot nor the cold solution conducted the 
electricity. 
6. Iodine is also soluble in chloride of sulphur, forming a 
deep red liquid; much more is taken up by boiling, and upon 
cooling, crystals, probably of unaltered iodine, are precipitated. 
Dr. Inglis says that “iodine and chloride of sulphur form a 
compound, having many of the properties of bromine; but 
that it is decomposed by galvanism, which the real bromine is 
not.” The result of my experiments was different, for I found 
that when the red liquid was submitted to the electric current 
in G, it formed a perfect barrier to the passage of the elec- 
tricity, and it is very certain that decomposition cannot be 
effected without conduction. Perhaps Dr. Inglis will state 
how the experiment was performed, and at which electrode the 
jodine was evolved, or what were the substances evolved. 
7. Bromine I found to be a nonconductor when placed in 
the tube G; a solution of bromine in water was a much better 
conductor than pure water, as M. De la Rive has mentioned 
(see the above-quoted memoir). In these and all the follow- 
ing experiments here described, the test of the wire (3.) was 
applied. 
s. A solution of bromine in ether conducts. AXther seems 
to have a remarkable action on the colours of solutions con- 
taining bromine, for whenever it is added to any of the deep 
red solutions containing bromine, or the iodide of bromine, 
the colour is rendered considerably lighter, so that an almost 
opake solution becomes pale yellow, and quite transparent. 
9. Bromine is soluble in chloride of sulphur, in the same 
way as iodine, forming a beautiful red solution: this proved a 
nonconductor; but upon adding a few drops of zther it be- 
came aconductor. Bromine is also soluble in carburet of 
sulphur, forming a splendid red solution, similar to the fore- 
mentioned one: this was likewise a nonconductor; but a few 
drops of zether rendered it a conductor. 
10. Periodide of bromine was a conductor; the current 
transmitted by it was fully able to decompose the iodide of po- 
tassium at E and F; but thedecomposition of water, also placed 
in the circuit, was effected with some difficulty. A little water 
was now added to the periodide of bromine; the water floated 
at the top, and dissolved a small portion of it: the water and the 
