jacket, I traversed the slushy mass at a
temperature of six or seven degrees below zero, I remarked that the
side walls were gradually closing in. The beds of water farthest from
the trench, that were not warmed by the men's work, showed a tendency
to solidification. In presence of this new and imminent danger, what
would become of our chances of safety, and how hinder the
solidification of this liquid medium, that would burst the partitions
of the Nautilus like glass?

I did not tell my companions of this new danger. What was the good of
damping the energy they displayed in the painful work of escape? But
when I went on board again, I told Captain Nemo of this grave
complication.

"I know it," he said, in that calm tone which could counteract the most
terrible apprehensions. "It is one danger more; but I see no way of
escaping it; the only chance of safety is to go quicker than
solidification. We must be beforehand with it, that is all."

On this day for several hours I used my pickaxe vigorously. The work
kept me up. Besides, to work was to quit the Nautilus, and breathe
directly the pure air drawn from the reservoirs, and supplied by our
apparatus, and to quit the impoverished and vitiated atmosphere.
Towards evening the trench was dug one yard deeper. When I returned on
board, I was nearly suffocated by the carbonic acid with which the air
was filled--ah! if we had only the chemical means to drive away this
deleterious gas. We had plenty of oxygen; all this water contained a
considerable quantity, and by dissolving it with our powerful piles, it
would restore the vivifying fluid. I had thought well over it; but of
what good was that, since the carbonic acid produced by our respiration
had invaded every part of the vessel? To absorb it, it was necessary
to fill some jars with caustic potash, and to shake them incessantly.
Now this substance was wanting on board, and nothing could replace it.
On that evening, Captain Nemo ought to open the taps of his reservoirs,
and let some pure air into the interior of the Nautilus; without this
precaution we could not get rid of the sense of suffocation. The next
day, March 26th, I resumed my miner's work in beginning the fifth yard.
The side walls and the lower surface of the iceberg thickened visibly.
It was evident that they would meet before the Nautilus was able to
disengage itself. Despair seized me for an instant; my pickaxe nearly
fell from my hands. What