This completes what I think one may state and defend on physical grounds concerning the foundations of Astrology and the coming year 1602. If those learned in matters of Physics think them worthy of consideration, and communicate to me their objections to them, for the sake of eliciting the truth, I shall, if God grants me the skill, reply to them in my prognostication for the following year. I urge all who make a serious study of philosophy to engage in (...) this contest. For it concerns our worship of God and the welfare of the human race. Meanwhile, I pray from the depths of my soul, through Christ our mediator, that for all and for each the coming year may be a very happy one. (shrink)

Aristotle described the earth as a cold and dry body and paid no attention to the phenomenon of terrestrial heat. Renaissance physicians, by contrast, when seeking to understand the origin of hot springs in the context of their balneological studies, came to defend a theory of subterranean fires. This tradition, which started in Italy, became widely known through the works of Georgius Agricola. But although it had implications for the explanation of further natural phenomena, it remained almost exclusively confined to (...) medical circles. As far as physics as an academic discipline was concerned, the ideas concerning subterranean fire were hardly taken note of. Only with the collapse of Aristotelian philosophy in the seventeenth century could these by then "old innovations" obtain a wider significance. (shrink)