After the birth of thermodynamics’ second principle—outlined in Carnot's Réflexions sur la puissance motrice du feu —several studies provided new arguments in the field. Mainly, they concerned the thermodynamics’ first principle—including energy conceptualisation—, the analytical aspects of the heat propagation, the statistical aspects of the mechanical theory of heat. In other words, the second half of nineteenth century was marked by an intense interdisciplinary research activity between physics and chemistry: new disciplines applied to the heat developed in the form of (...) analytical, mechanical and statistical theories. Inside all these theories, entropy—the brand-new function that Clausius coined in his Mechanical theory of heat—started to play a central epistemic role. In the present paper, we analyse some steps of the historical process of conceptualisation of such function from 1850 to 1902. Particularly, we retrace the historical–foundational path that—starting from Clausius’ Second Law—lead Boltzmann and Gibbs to their distinguished formulations of statistical entropy. As usual, our research has been unrolled through the analyses of primary sources and by leaning on critical readings of the secondary literature. As for the methodological approach, text analysis of historical documents constituted our privileged modus operandi. This paper is the expression of a collaborative historical research program focused on the thermodynamic foundations of physics–chemistry relationship; early results have already been published by the same authors upon the concepts of reversibility––and––thermal equilibrium. (shrink)

Starting from the seminal experience of James Prescott Joule, this paper aims to debate the possibility of “making” science outside universities and academies. Joule himself studied as an autodidact and did not make his own discoveries while following an academic path; on the contrary, at first, the associations and academic societies of the time tended not to recognize his works officially. All of this happened throughout the nineteenth century during the period of the first relevant tendency to science popularization. For (...) example, looking at the second half of the England of the 1800s, we can refer to Michael Faraday’s open lessons for children like The Chemical History of a Candle. Following this perspective from a historical view, this paper explores the Italian attempts to communicate science—from the ‘50s to the ‘70s—to a larger public via television and other media, also considering the political and social backgrounds behind this choice. In particular, this paper also deals with Lucio Lombardo Radice’s work on TV programs and writings in social-political journals and daily newspapers, as a mathematician and pedagogist engaged on the importance of what he specifically called “Scientific mediation”, as a “method” to teach and popularize science to a larger public. (shrink)