From thence it
descends into the retort, G, where it is roasted by the heat of the
fireplace, L. The sulphur converted into a state of vapor passes through
the conduit, R, into the coke or charcoal retort, G', which is divided
into two parts by the partition, _g g'_, of refractory clay, and heated
by the fireplace, L'.
[Illustration: LABOIS'S SULPHIDE OF CARBON FURNACE.]
The conduit, R', leads the sulphide of carbon in a state of vapor to the
condensing apparatus. The uncombined sulphur which is carried along is
deposited in the first part of the retort by the arrangement of the
partition, which permits of passage only below. The registers, V and
V', permit of the introduction of the sulphur vapor and the exit of the
sulphide of carbon being regulated.
The apparatus is so easy of installation that it may be applied without
much expense to pyrites furnaces already in operation.
Wherever a manufactory of the product is to be started, the system
recommends itself by its simplicity, and by the facility with which the
operation may be watched and conducted.
* * * * *
BROUARDEL'S DRY INSCRIBING MANOMETER.
Brouardel's manometer, represented herewith, is designed for showing
graphically variations in the pressure of gas, either at the works
during the course of manufacture, or at any point whatever in the system
of piping.
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