This paper investigates the relation between Gabriel Plattes’ cosmology and theory of matter, on the one hand, and his method of experimentation, on the other. In my view Plattes based his cosmology and theory of matter on specific “principles of nature” expressed as alchemical qualitative relations between bodies, and these principles formed the theoretical framework for his experimental method and technologies. I also claim that Plattes’ method of experimentation has heuristic purposes, acting as a tool to instantiate and illustrate these (...) natural principles. By quantifiable manipulations of matter, Plattes made use of experimentation to provide technologies whose immediate purpose was to ameliorate or improve the material world. (shrink)

This paper investigates the emergence, in the second part of the 17th century, of a new body of experimental knowledge dealing with the chemical transformations of water taking place in plants. We call this body of experimental knowledge a “chemical history of vegetation.” We show that this chemical natural history originated, in terms of recipes and methods of investigation, in the works of Francis Bacon and that it was constructed in accordance with Bacon's precepts for putting together natural and experimental (...) histories. Our paper covers a wide array of experimental investigations, carried out by people with different backgrounds, theoretical assumptions, and metaphysical allegiances (Thomas Browne, Robert Sharrock, Robert Boyle, Nehemiah Grew, John Beale, and John Evelyn). We claim that, despite their differences, these naturalists had a lot in common. First, they treated plants as laboratories of chemical investigation. Second, they used the experiments with plants to develop tools, hypotheses, and operational concepts, which travelled from one naturalist to the other, even when their respective explanatory vocabularies were widely different. Third, we show that some of them also manifested an interest in defining and clarifying the limits and structure of this new body of experimental knowledge, displaying, thus, a certain disciplinary unity. (shrink)

At various points in his work on physiology and medicine, Descartes refers to a “principle of life.” The exact term changes—sometimes, it is the “principle of movement and life”, sometimes the “principle underlying all [the] functions” of the body —but the message seems consistent: the phenomena of living bodies are the product of a single, underlying principle. That principle is generally taken to be cardiac heat.1 The literature has, quite reasonably, taken this message at face value. Thus, Shapiro: “Descartes insists (...) again and again that the human body is properly to be described as a machine whose workings are […] driven by the heat in the heart that... (shrink)