The evolution of gas is thereby
gradually curtailed or stopped until more is required for consumption.
The water displacement causes the water-level in the outer tank to rise
to _N1 N'1_ and ultimately to, say _N2 N'2_. The lime formed by
the decomposition of the carbide is loosened from the unattacked portion
and taken more or less into solution as sucrate of lime, which is a
soluble salt which the glucose or sugar in the treated carbide forms with
lime. The solution is eventually run off through the cock _R_. The
cover _T_ of the filter is screwed down on rubber packing until gas-
tight. The purifier is charged with puratylene or other purifying
material.
[Illustration: FIG. 29.--ACETYLITHE GENERATOR.]
_Maker_: L. DEBRUYNE, 22 PLACE MASUI, BRUSSELS.
_Type_: (1) Automatic; carbide-to-water.
The generating plant made by this firm, using granulated carbide,
comprises an equalising gasholder _E_ alongside a generating tank
_B_, which is surmounted by a closed carbide receptacle _A_ and
a distributing appliance. The carbide receptacle is filled with
granulated carbide and the lid _N_ screwed down; the carbide is then
withdrawn from the base of the receptacle by the distributing appliance
and discharged in measured quantities as required into the water in the
generating tank.
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