This paper tries to demonstrate that some passages of Pliny's Naturalis historia on metallurgical materials are influenced by the Stoic philosopher Posidonius' view that surfaces possess a physical existence. Indeed, Pliny reports that copper surfaces are material, both acting towards drawing a patina to themselves, and being acted upon; i.e. they are both chemically modified by air and fire, and subject to mechanical removal. Also relatable to Posidonius, namely to his view of the interaction between soul and body, is Pliny's (...) account of lead and tin, which can be united thanks to the action they mutually exert on each other, since each metal holds together both itself and what is outside itself. A further influence from the ‘aetiologist’ Posidonius is also betrayed in the care Pliny exercises in describing not only metal corrosion and soldering, but also their causes. Both the scientific and the philosophical imports of these passages are compared with passages by Plato and Plutarch on metallurgical subjects; they are also discussed in the light of the theories on ‘mixture’ propounded by Aristotle and by the Old Stoics. It is shown that Pliny's account compares favorably with Posidonius' doctrine, whereas it is at striking variance with the other ancient reports. Introduction Philosophical and literary evidence 2.1 Pliny 2.2 Posidonius 2.3 Plato and Plutarch Discussion Conclusion. (shrink)

The conception of philosophy we have inherited from ancient Greek tradition, and especially from Hellenistic Stoicism proves to be insightful even today. On the one hand, philosophy was considered as inseparable from life in terms of good life, thus ethically oriented and corresponding to virtue – perspective which still dominates the current interpretation of Stoicism. On the other hand, philosophy was connected to life through a specific link to logos. In this paper, I address the issue of the relationship between (...) language and virtue in Stoicism. I will suggest that, with the Stoics, “logic” can coincide with ethics, and that the seal of their reconciliation is to find in the human language. (shrink)