Concerning the First Principle of Cold (19-20)

This being obvious to sight, let us consider the effect. Every faculty, wherever it prevails, changes into itself whatever it overcomes. Thus whatever is overcome by heat is set on fire; that which is vanquished by wind is changed into air. That which falls into water becomes well moistened, unless quickly saved. Of necessity, therefore, those things which are violently affected by cold must be changed into the primitive cold. For freezing is an excess of refrigeration; which congelation ends in alteration and petrifaction, when the cold, prevailing every way, congeals the liquid substance and presses forth the heat; so that the bottom of the earth is, as it were, a kind of congelation, and altogether ice. For there the cold inhabits simple and unmixed, and removed hard and rigid at

the greatest distance from the sky. But as for those things which are conspicuous, as rocks and precipices, Empedocles believes them to be thrust forth and supported by the fire that burns in the bottom of the earth. Which appears the more, in regard that, wherever the heat is pressed forth and vanishes away, all those things are congealed or stiffened by the cold; and therefore congelations are called πάγοι (stiffened). And the extremities of many things where heat fails, growing black, make them look like brands when the fire is out. For cold congeals some things more, some things less; more especially such things wherein it is primitively existent. For as, if it be the nature of hot to render light, that which is hottest is lightest; if of moist to soften, that which is moistest is softest; so if it be the nature of cold to congeal, of necessity that which is coldest must be most congealed,—that is to say the earth,—and that which is most cold must be that which is by nature and primitively cold, which is no more than what is apparent to sense. For mud is colder than water, and earth being thrown upon fire puts it out. Your smiths also, when their iron is melted and red hot, strew upon it the dust of marble to cool it and stop the running of it too fluidly. Dust also cools the bodies of the wrestlers, and dries up their sweat.

To go no farther, what means our own yearly practice to alter our lodgings and habitations, while we remove in the winter so far as we can into the upper parts of our buildings, but in the summer descend again and seek convenient refuge in the lower edifices, sometimes enjoying ourselves under ground in the very arms of the earth? Do we not do it, as being guided by our senses for coolness’s sake to the earth, and thereby acknowledging that to be the seat of primitive cold? And certainly our coveting to live near the sea in winter may be thought to be a kind of flight from the earth, since we seem to forsake it,

as far as we can, by reason of the nipping frosts, and run to encircle themselves with the air of the sea for warmth’s sake; and then again in the summer, by reason of the scorching heat, we desire the earth-born upland air, not because it is cold of itself, but because it had its original and blossomed from the primitive natural cold, and is imbued with that power which is in the earth, as iron is imbued with the virtue of the water wherein it is quenched. Then again, of river waters we find those are the coldest that flow upon gravel and stones and fall down from mountains; and of well-waters, those which are in the deepest wells. For with these the exterior air is no longer mixed, by reason of the depth of the wells, and the other arise out of the pure and unmixed earth; like the river that falls from the mountain Taenarum, which they call the water of Styx, rising out of a rock with a parsimonious spring, but so cold that no other vessel except the hoof of an ass will hold it; for all other sorts of vessels it breaks and cracks to pieces.