After having skirted the sands of Cartier, of Hibernia, Seringapatam,
and Scott, last efforts of the solid against the liquid element,
on the 14th of January we lost sight of land altogether.
The speed of the Nautilus was considerably abated, and with
irregular course she sometimes swam in the bosom of the waters,
sometimes floated on their surface.
During this period of the voyage, Captain Nemo made some interesting
experiments on the varied temperature of the sea, in different beds.
Under ordinary conditions these observations are made by means of
rather complicated instruments, and with somewhat doubtful results,
by means of thermometrical sounding-leads, the glasses often breaking
under the pressure of the water, or an apparatus grounded on
the variations of the resistance of metals to the electric currents.
Results so obtained could not be correctly calculated. On the contrary,
Captain Nemo went himself to test the temperature in the depths of the sea,
and his thermometer, placed in communication with the different sheets
of water, gave him the required degree immediately and accurately.
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