Eric Schliesser

In this article, the author offers a discussion of the evidential role of the Galilean constant in the history of physics. The author argues that measurable constants help theories constrain data. Theories are engines for research, and this helps explain why the Duhem-Quine thesis does not undermine scientific practice. The author connects his argument to discussion of two famous papers in the history of economic methodology, Milton Friedman's 'Methodology of Positive Economics', which appealed to example of Galilean Law of Fall in its argument; and Vernon Smith's 'Economics in the Laboratory'. While the author offers some criticism of Friedman and Smith, most of the article is a friendly reinterpretation of their insights.

In this paper I revisit Adam Smith’s treatment of Copernicanism and Newtonianism in his essay, “The History of Astronomy” (hereafter: “Astronomy”), in light of a surprisingly ignored context: David Hume. This remark will strike most scholars of Adam Smith as unfounded—David Hume’s philosophy is often invoked as a source of Smith’s approach in the “Astronomy” or as its target. Yet, Hume’s occasional remarks on Copernicanism nor his treatment of the history of science in the History of England (1754-62, but revised throughout Hume’s life) have not been carefully analyzed in light of the “Astronomy.” In the first five sections of this paper I offer a detailed analysis of all of Hume’s remarks on the Copernican system in his oeuvre. I show that David Hume believed that Copernicus achieved a “revolution” in philosophy. Moreover, I argue that Hume increasingly treats Galileo as the hero of the Copernican revolution. In doing so, Hume appears surprisingly blind to the importance of post-Galilean natural philosophy, especially the (dynamical) arguments that Huygens and Newton provided for the rotation of the Earth. In the last section of the paper, I argue that Adam Smith does show appreciation of dynamic views. I show that Smith and the mature Hume agree on the importance of Galileo, even describing his method in strikingly similar language, but that they evaluate the evidence differently in light of two conflicting commitments: i) Hume is committed to the “true philosophy”—-a certain kind of scepticism which Smith does not share; ii) Hume never seems to have assimilated the way Newton changed the evidential standards within science.

This chapter explains what Isaac Newton means with the phrase “absolute, true, and mathematical time” in order to discuss some of the philosophic issues that it gives rise to. It describes Newton's thought in light of a number of scientific, technological, and metaphysical issues that arose in seventeenth‐century natural philosophy. The first section discusses some of the relevant context from the history of Galilean, mathematical natural philosophy, especially as exhibited by the work of Christiaan Huygens. The second section offers a close reading of what Newton says about time in the Principia's Scholium to the definitions. It argues that Newton allows us to conceptually distinguish between “true” and “absolute” time from the vantage point of Newton's dynamics. The third section, in the context of a brief account of Descartes' views on time, discusses the material that Newton added to the second edition of the Principia in the General Scholium.