This latter is
provided with two pipes, one of which, s, leads the mixture of water
and carbonic acid forced by the pump, and the other, b, communicates
with the siphons or bottles to be filled. The pipe, b, is not affixed
directly to the bottom, but is connected therewith through the
intermedium of a cock, r. The object of the broken form of this pipe
is to cause the pressure to act according to the axis of the screw, r,
which is maneuvered by the key, r squared.
The water under pressure, having been forced into the vessel, S, is
submitted therein to an agitation that allows it to dissolve a larger
quantity of gas. Such agitation is produced by two pairs of paddles, J
J, mounted at the extremity of an axle actuated by the wheel, A, through
the intermedium of gearings, g and g.
The course of the operation in the saturator may be followed by an
inspection of the water level, n, seen at the front and side in Figs.
2 and 3. This apparatus, in which the pressure reaches 4 to 6
atmospheres in the manufacture of Seltzer water or gaseous lemonade in
bottles, and from 10 to 12 atmospheres in that of Seltzer water in
siphons, is provided also with a pressure gauge, m, and a safety
valve, both screwed, as is also the tube, n squared, into a sphere, S, on
the top of the saturator.
_Apparatus for Using Carbonate of Lime_ (Figs 2, 3, and 10)--When chalk
is acted upon by sulphuric acid, there is formed an insoluble sulphate
which, by covering the chalk, prevents the action of the acid from
continuing if care be not taken to constantly agitate the materials.
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