Professor Emeritus of the University of Athens Panagiotis Siskos forewords.

The present book aims to prove on the one hand that Hymeia (in the current sense of the term) was founded and developed in Ancient Greece, and on the other hand that the Greek juice makers (empirical juice makers) had nothing to do with the alchemists of the Eastern countries who had mainly occupation the manufacture of gold from non-precious metals. Empirical humorists are presented in the Greek area and during prehistoric times. And many natural philosophers formulate correct humoral concepts in the context of philosophy, but without using the experiment.