This
shaft passes through a stuffing-box to the outside of the generator and
can be rotated by moans of the chains _f_, the pulleys _g_ and
_h_, and the winch _i_. Its rotation causes rotation of the
disc _d_. The disc _d_, on which the bottoms of the carbide-
holders are supported, is provided with a slot _e_. On rotating the
disc, on which the supporting wires of the bottoms of the carbide-holders
rest, the slot is brought beneath these wires in succession; and the
bottoms, being thus deprived of their support, drop down. It is possible
in this way to effect the discharge of the several carbide-holders by
gradual turning of the winch _i_.
"The washer B is provided with a thermometer _m_ passing through a
sound stuffing-box and extending into the water.
"The gasholder C is provided with a scale and pointer, which indicate how
much gas there is in it. It is connected with the pressure-gauge
_n_, and is further provided with a control thermometer _o_.
The gas exit-pipe _q_ can be shut off by a cock. There is a cock
between the gasholder and the washer for isolating one from the other.
"The dimensions of the apparatus are such that each carbide-holder can
contain readily about half a kilogramme (say l lb.
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