These open into the receptacles, c and d, in which the
cocks, e and f, cut off or set up a communication with the pipes, a
and b. These latter are connected by a branch, g, which may be put in
communication with a reservoir, h, that is divided into two superposed
compartments by a partition, i. Such communication may be established
or cut off by a valve, j, maneuvered by a key, k, which traverses
an aperture in the partition, i. Another aperture, m, in this same
partition serves to put the two parts of the reservoir, h, in
communication, and, for this purpose, is provided with a cock, n, which
is easily maneuvered from the exterior.
The object of this arrangement of cocks and reservoir is to prevent the
siphon from losing its priming through the possible presence in the
transverse portion of a certain quantity of air or gas that might be
given off by the water and accumulate in this place.
The compartment, A, of the reservoir, h, is designed for receiving the
gases that collect in the top of the siphon, while the upper compartment
contains water for making a hydraulic joint, and consequently preventing
any re-entrance of air through the apertures in the partition, i.
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