No. 52. A Drinking-Horn in which a peculiarly formed Siphon is
fixed.
THE construction of a drinking-horn such that, if a cover of glass be
placed upon it, while a discharge is going on from the vessel, the
liquid shall ascend into the glass cover and be thrown back. A B C
(fig. 52), is a drinking horn, closed by the covering D E; and from D E
extend two tubes, F G, H K, one of them, H K, leading into the interior
of the vessel, the other, F G, leading outside. A glass cover, M N,
incloses this; and in the top, D E, outside the
glass vessel, is an aperture, x, through which water may be poured. When
the horn is filled through this aperture, the tube H K will be filled at
the same time, and as the water is poured in it will ascend into the
glass vessel so as to be carried outside through the tube F G. Thus we
shall have the arrangement of a bent siphon, of which H K is the smaller
leg and F G the greater, so that it will attract the liquid in the horn
as it ascends into the cover; it will also attract the air contained in
the cover, which is lighter than the liquid, and the water will appear
to be thrown back into the void space left by the air and to descend by
its own weight; for this upward motion is contrary to its nature.