Technikatörténeti szemle 19. (1992)

KÖNYVISMERTETÉS - Papers of the First „MINERALKONTOR” International Conference on the History of Chemistry and Chemical Industry (Veszprém, 12-16 August, 1991)

increasing according to the proportion mentioned above, in depths not accessible for us we cannot escape the conclusion that the mass of our globe must be in a glowing, fluid state even at a few miles' depth. The terrible phenomena of fire-throwing mountains erupting occasionally on the surface are to prove this conclusion. But however high the temperature of the globe may be, it should decrease due to the continuously radiated heat unless there are other heat sources as well.... The main source of temperature prevailing on Earth is the sun..." The temperature of Earth is constant approximately because the rotational velocity of our globe has not changed even .01 second since the time of Hipparchus. Hence it follows that its volume could not change either, i. e. neither expanded nor contracted, thus it is neither warmer nor colder, from this it can be concluded that our globe loses as much heat by radiation as it... gains...".