I cannot help making the remark.

"Well," he replied, "how does that make against my doctrine?"

"Oh, nothing at all," I said, seeing that I was going in opposition to immovable obstinacy.

Still I am constrained to confess that hitherto we have been wonderfully favoured, and that for some reason unknown to myself we have accomplished our journey under singularly favourable conditions of temperature. But it seems manifest to me that some day we shall reach a region where the central heat attains its highest limits, and goes beyond a point that can be registered by our thermometers.

"That is what we shall see." So says the Professor, who, having named this volcanic islet after his nephew, gives the signal to embark again.

For some minutes I am still contemplating the geyser. I notice that it throws up its column of water with variable force: sometimes sending it to a great height, then again to a lower, which I attribute to the variable pressure of the steam accumulated in its reservoir.

At last we leave the island, rounding away past the low rocks on its southern shore. Hans has taken advantage of the halt to refit his rudder.

But before going any farther I make a few observations, to calculate the distance we have gone over, and note them in my journal. We have crossed two hundred and seventy leagues of sea since leaving Port Gräuben; and we are six hundred and twenty leagues from Iceland, under England. [1]

[1] This distance carries the travellers as far as under the Pyrenees if the league measures three miles. (Trans.)

CHAPTER XXXV.

AN ELECTRIC STORM

_Friday, August 21_. - On the morrow the magnificent geyser has disappeared. The wind has risen, and has rapidly carried us away from Axel Island. The roarings become lost in the distance.

The weather - if we may use that term - will change before long. The atmosphere is charged with vapours, pervaded with the electricity generated by the evaporation of saline waters. The clouds are sinking lower, and assume an olive hue. The electric light can scarcely penetrate through the dense curtain which has dropped over the theatre on which the battle of the elements is about to be waged.

I feel peculiar sensations, like many creatures on earth at the approach of violent atmospheric changes. The heavily voluted cumulus clouds lower gloomily and threateningly; they wear that implacable look which I have sometimes noticed at the outbreak of a great storm. The air is heavy; the sea is calm.

In the distance the clouds resemble great bales of cotton, piled up in picturesque disorder. By degrees they dilate, and gain in huge size what they lose in number. Such is their ponderous weight that they cannot rise from the horizon; but, obeying an impulse from higher currents, their dense consistency slowly yields. The gloom upon them deepens; and they soon present to our view a ponderous mass of almost level surface. From time to time a fleecy tuft of mist, with yet some gleaming light left upon it, drops down upon the dense floor of grey, and loses itself in the opaque and impenetrable mass.

The atmosphere is evidently charged and surcharged with electricity. My whole body is saturated; my hair bristles just as when you stand upon an insulated stool under the action of an electrical machine. It seems to me as if my companions, the moment they touched me, would receive a severe shock like that from an electric eel.

At ten in the morning the symptoms of storm become aggravated. The wind never lulls but to acquire increased strength; the vast bank of heavy clouds is a huge reservoir of fearful windy gusts and rushing storms.

I am loth to believe these atmospheric menaces, and yet I cannot help muttering:

"Here's some very bad weather coming on."

The Professor made no answer. His temper is awful, to judge from the working of his features, as he sees this vast length of ocean unrolling before him to an indefinite extent. He can only spare time to shrug his shoulders viciously.

"There's a heavy storm coming on," I cried, pointing towards the horizon.