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to the other Bromide combinations. It can be readily prepared by
passing a current of chlorine through a vessel containing bromine.
A mixture of two parts muriatic acid and one of black oxide
of manganese, should be put into a flask having a bent tube
to conduct the chlorine vapor into the bromine in another vessel.
This last vessel should also be supplied with a bent tube for
conducting the combined vapors with a third vessel or receiver.
On the application of the heat from a spirit lamp to the bottom
of the flask, a current of chlorine gas will be disengaged,
and pass into the bromine, when it readily combines, and gives
off a vapor, which, when condensed in the third vessel,
forms a volatile yellowish-red liquid. It is best, even at
ordinary temperature, to place the receiver in an ice bath.
For manner of using, see farther on, under head of Accelerators.

Bromides.--A bromide treated with oil of vitriol, disengages
chlorohyadic acid; but vapors of bromine are constantly disengaged,
at the same time imparting a brown color to the gas.
If the bromide be treated with a mixture of sulphuric acid,
and peroxide of manganese, bromide is only disengaged.
A solution of a bromide gives, with of nitrate

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silver, a light yellowish white precipitate of bromide of silver,
which is insoluble in an excess of acid, and readily dissolves in ammonia.
The precipitated bromide is colored by light like the chloride, but is