“You see all these volumes of steam, Axel; well, they demonstrate that we have nothing to fear from the fury of a volcanic eruption.”
“Am I to believe that?” I cried.
“Understand this clearly,” added the Professor. “At the approach of an eruption these jets would redouble their activity, but disappear altogether during the period of the eruption. For the elastic fluids, being no longer under pressure, go off by way of the crater instead of escaping by their usual passages through the fissures in the soil. Therefore, if these vapours remain in their usual condition, if they display no augmentation of force, and if you add to this the observation that the wind and rain are not ceasing and being replaced by a still and heavy atmosphere, then you may affirm that no eruption is preparing.”
“But—”
“No more; that is sufficient. When science has uttered her voice, let babblers hold their peace.”
I returned to the parsonage, very crestfallen. My uncle had beaten me with the weapons of science. Still I had one hope left, and this was, that when we had reached the bottom of the crater it would be impossible, for want of a passage, to go deeper, in spite of all the Saknussemm’s in Iceland.
I spent that whole night in one constant nightmare; in the heart of a volcano, and from the deepest depths of the earth I saw myself tossed up amongst the interplanetary spaces under the form of an eruptive rock.
The next day, June 23, Hans was awaiting us with his companions carrying provisions, tools, and instruments; two iron pointed sticks, two rifles, and two shot belts were for my uncle and myself. Hans, as a cautious man, had added to our luggage a leathern bottle full of water, which, with that in our flasks, would ensure us a supply of water for eight days.
It was nine in the morning. The priest and his tall Megæra were awaiting us at the door. We supposed they were standing there to bid us a kind farewell. But the farewell was put in the unexpected form of a heavy bill, in which everything was charged, even to the very air we breathed in the pastoral house, infected as it was. This worthy couple were fleecing us just as a Swiss innkeeper might have done, and estimated their imperfect hospitality at the highest price.
My uncle paid without a remark: a man who is starting for the centre of the earth need not be particular about a few rixdalers.
This point being settled, Hans gave the signal, and we soon left Stapi behind us.
XV
Snæfells at Last
Snæfells is 5,000 feet high. Its double cone forms the limit of a trachytic belt which stands out distinctly in the mountain system of the island. From our starting point we could see the two peaks boldly projected against the dark grey sky; I could see an enormous cap of snow coming low down upon the giant’s brow.
We walked in single file, headed by the hunter, who ascended by narrow tracks, where two could not have gone abreast. There was therefore no room for conversation.
After we had passed the basaltic wall of the fjord of Stapi we passed over a vegetable fibrous peat bog, left from the ancient vegetation of this peninsula. The vast quantity of this unworked fuel would be sufficient to warm the whole population of Iceland for a century; this vast turbary measured in certain ravines had in many places a depth of seventy feet, and presented layers of carbonized remains of vegetation alternating with thinner layers of tufaceous pumice.
As a true nephew of the Professor Liedenbrock, and in spite of my dismal prospects, I could not help observing with interest the mineralogical curiosities which lay about me as in a vast museum, and I constructed for myself a complete geological account of Iceland.
This most curious island has evidently been projected from the bottom of the sea at a comparatively recent date. Possibly, it may still be subject to gradual elevation. If this is the case, its origin may well be attributed to subterranean fires. Therefore, in this case, the theory of Sir Humphry Davy, Saknussemm’s document, and my uncle’s theories would all go off in smoke. This hypothesis led me to examine with more attention the appearance of the surface, and I soon arrived at a conclusion as to the nature of the forces which presided at its birth.
Iceland, which is entirely devoid of alluvial soil, is wholly composed of volcanic tufa, that is to say, an agglomeration of porous rocks and stones. Before the volcanoes broke out it consisted of trap rocks slowly upraised to the level of the sea by the action of central forces. The internal fires had not yet forced their way through.
But at a later period a wide chasm formed diagonally from southwest to northeast, through which was gradually forced out the trachyte which was to form a mountain chain. No violence accompanied this change; the matter thrown out was in vast quantities, and the liquid material oozing out from the abysses of the earth slowly spread in extensive plains or in hillocky masses. To this period belong the feldspar, syenites, and porphyries.
But with the help of this outflow the thickness of the crust of the island increased materially, and therefore also its powers of resistance. It may easily be conceived what vast quantities of elastic gases, what masses of molten matter accumulated beneath its solid surface whilst no exit was practicable after the cooling of the trachytic crust. Therefore a time would come when the elastic and explosive forces of the imprisoned gases would upheave this ponderous cover and drive out for themselves openings through tall chimneys. Hence then the volcano would distend and lift up the
