Marginal drawing in the Flateyjarbók (1387-1394)
The principal countries described are Ireland, Iceland and Greenland; but it is characteristic of the author that the farther north he goes, away from regions commonly known, the freer his account becomes from all kinds of fabulous additions. In Ireland he is still held fast by the superstition of the period, and especially by the priests’ fables about themselves and their holy men, and by the English author Giraldus Cambrensis.[242] In Iceland, as a rule, he is free of this troublesome ballast, and gives valuable information about the glaciers of Iceland, glacier-falls, boiling springs, etc. In his opinion the cold climate of Iceland is due to the vicinity of Greenland, which sends out great cold owing to its being above all other lands covered with ice; for this reason Iceland has so much ice on its mountains. Although he thinks it possible that its volcanoes are due to the fires of Hell, and that it is thus the actual place of torment, and that Hell is therefore not in Sicily, as his holiness Pope Gregory had supposed, he nevertheless has another and more reasonable explanation of the origin of earthquakes and volcanoes. They may be due to hollow passages and cavities in the foundations of the land, which by the force either of the wind or of the roaring sea may become so full of wind that they cannot stand the pressure, and thus violent earthquakes may arise. From the violent conflict which the air produces underground, the great fire may be kindled which breaks out in different parts of the country. It must not be thought certain that this is exactly how it takes place, but one ought rather to lay such things together to form the explanation that seems more conceivable, for
Fire derived from force (labour)
“we see that from force [‘afli’] all fire comes. When hard stone and hard iron are brought together with a blow, fire comes from the iron and from the force with which they are struck together. You may also rub pieces of wood together until fire comes from the labour that they have. It is also constantly happening that two winds arise from different quarters, one against the other, and if they meet in the air there is a hard shock, and this shock gives off a great fire, which spreads far in the air,” etc.
This idea of a connection between labour (friction) and force (motion), and this explanation of the possible origin of volcanoes are surprising in the thirteenth century, and seem to bring the author centuries in advance of his time; we here have germs of the theory of the conservation of energy.
The inland ice of Greenland
His statements about Greenland are remarkable for their sober trustworthiness. He gives the first description of its inland ice:
“But since you asked whether the land is thawed or not, or whether it is covered with ice like the sea, you must know that there are small portions of the land which are thawed, but all the rest is covered with ice, and the people do not know whether the country is large or small, since all the mountains and valleys are covered with ice, so that no one can find his way in. But in reality it must be that there is a way, either in those valleys that lie between the mountains, or along the shores, so that animals can find a way, for otherwise animals cannot come there from other countries, unless they find a way through the ice and find the land thawed. But men have often tried to go up the country, upon the highest mountains in various places, to look around them, to see whether they could find any part that was thawed and habitable, but they have not found any such, except where people are now living, and that is but little along the shore itself.”
