Questo articolo analizza il De honesta voluptate et valetudine di Platina come esempio emblematico per mostrare che un'accurata analisi filologica può aiutare non solo a chiarire i contesti teorici in cui un'opera può essere collocata, ma anche a fornire una miglior comprensione delle sue implicazioni filosofiche. In questo lavoro letterario, che è sia un libro di cucina sia un manuale di dietetica, Platina ha intrecciato una varietà di fonti antiche e moderne, più o meno riconoscibili: egli non si (...) è limitato a riproporre le ricette di Martino da Como, ma ha varcato la soglia della cucina combinando gli insegnamenti della dietetica medievale, che si basava sulla teoria galeniana degli umori, con alcune ipotesi stoiche, non considerate in conflitto con una moderata ricerca del piacere di mangiare. In tal modo, ha sviluppato un’originale riflessione sul vivere bene, in cui la felicità tende a coincidere con il benessere fisico. This article analyses Platina’s De honesta voluptate et valetudine as an emblematic example of how an accurate philological analysis can help to clarify the theoretical contexts in which a work can be placed and even provide a clearer grasp of its philosophical assumptions. In this literary work, which is both a cookbook and a dietetic manual, Platina interwove a variety of ancient and modern sources, more or less easily discernible: he did not limit himself to collect Martino of Como’s recipes, but crossed the threshold of the kitchen by combining the teaching of medieval dietetics, which was based on Galen’s theory of bodily humours, with some Stoic assumptions, which he viewed as not being in conflict with a moderate pursuit of the pleasure of eating. In doing so, he developed an intriguing reflection on living well according to which happiness tends to coincide with physical wellbeing. (shrink)

SummaryIn this article, I examine friendship as a subject of political theory rather than as a social practice relevant to political life. As suggested by Francesco d'Altobianco Alberti in the poem recited at the first certame coronario, two ideas of political friendship existed side by side in Medicean Florence. They appeared in full in Palmieri's Vita civile and in Platina's De optimo cive. As I will show, the Ciceronian language of friendship is used in these works to resolve two (...) key problems of Renaissance political thought: the need for political unity and the just way of appointing the governing elite. Palmieri placed friendship in the political sphere of concord: he was a republican imperialist who believed that civic friendship protected the political unity of the city, without which Florence would not have been able to expand. Platina, on the other hand, situated friendship in the political sphere of counsel: his concern was to support the selection of the most virtuous and knowledgeable citizens, worthy of access to public office. While Palmieri looked back to the city's medieval past, Platina cast light on the politics of friendship that allowed the Medici to stay in power. (shrink)

The European demand for platina in the late eighteenth and early nineteenth centuries could not be met by the Spanish authorities who only authorized limited exports of the mineral, approximately 267 kg between 1750 and 1804. The lack of an adequate commercial structure generated direct trade between Latin America and Europe, particularly England. This article is an attempt to analyse and to quantify the three European sources of platina: exports from Spain, shipments of platina consigned by European (...) travellers, and direct trade. The reasons for the latter are studied, exemplified by the Wollaston case, and legal and direct trade are compared. (shrink)

(1980). William Wollaston, John Johnson and Colombian alluvial platina: A study in restricted industrial enterprise. Annals of Science: Vol. 37, No. 3, pp. 253-268.

This article deals with aspects of the reception of the Liber pontificalis in the fifteenth century. The Liber pontificalis, an anonymous series of biographies of popes from St Peter onwards, was one of the principal sources for the Lives of the Popes by the humanist Platina. I address Platina’s use of sources and some of his attempts at historical criticism. I also review his attitude towards the Latin he found in the Liber pontificalis and give a few examples (...) of how he transformed the language and style of the original text. (shrink)

In the course of his chemical investigation of crude platina ore, William Hyde Wollaston in 1802 isolated and characterized the metal palladium. In early 1803, he chose to make known his discovery by offering small samples of the metal for sale through a small shop in London. In the notice advertising the properties of the new metal, no information was given as to its source nor to its discoverer. The unique properties of the metal, and the secrecy surrounding its (...) discovery, led the Irish chemist Richard Chenevix to question the elemental nature of the new metal. His hasty but extensive investigation of the chemical properties of palladium convinced him that it was no more than an alloy of platinum and mercury, and he denounced the discovery as fraudulent. The president of the Royal Society, Joseph Banks, was drawn into the resulting furore, and correspondence between him and Chenevix reveals involved plans to obtain the identity of the palladium discoverer. The controversy is viewed as a significant episode in the continuing debate in the chemical community over the operational definition of a chemical element, and although Chenevix's concern over the growth in the number of new elements was justified, his choice of palladium as a test case was an unfortunate one, for his claim that the metal was an alloy was found to be erroneous. Motives for the actions of both Chenevix and Wollaston are sought, and the judgement that their careers were damaged by the incident is questioned. (shrink)