In a short work called De conceptione appended to the end of his Exercitationes de generatione animalium , William Harvey developed a rather strange analogy. To explain how such marvelous productions as living beings were generated from the rather inauspicious ingredients of animal reproduction, Harvey argued that conception in the womb was like conception in the brain. It was mostly rejected at the time; it now seems a ludicrous theory based upon homonymy. However, this analogy offers insight into the structure (...) and function of analogies in early modern natural philosophy. In this essay I hope to not only describe the complex nature of Harvey’s analogy, but also offer a novel interpretation of his use of analogical reasoning, substantially revising the account offered by Guido Giglioni . I discuss two points of conceptual change and negotiation in connection with Harvey’s analogy, understanding it as both a confrontation between the border of the natural and the supernatural, as well as a moment in the history of psychology. My interpretation touches upon a number of important aspects, including why the analogy was rejected, how Harvey systematically deployed analogies according to his notions of natural philosophical method, how the analogy fits into contemporary discussions of analogies in science, and finally, how the analogy must be seen in the context of changing Renaissance notions of the science of the soul, ultimately confronting the problem of how to understand final causality in Aristotelian science. In connection with the last, I conclude the essay by turning to how Harvey embeds the analogy within a natural theological cosmology. (shrink)

Giacomo Zabarella es considerado uno de los aristotélicos más prestigiosos y más influyentes del siglo XVI. Su obra lógica, sus escritos sobre física y sus comentarios, publicados póstumamente, tuvieron un enorme impacto especialmente en las primeras décadas del siglo XVII, y sirvieron como verdaderos manuales con los que se formaron muchos universitarios europeos. Este artículo analiza la figura de Zabarella centrándose en su obra sobre física, el De rebus naturalibus libri XXX, editado en 1590, apenas unos días antes de su (...) muerte. (shrink)

Sixteenth century pharmacology was still very much under the influence of a distinction going back to ancient medicine: the distinction between effects of medicaments that were taken to be explainable by the elementary qualities, their mutual modification in mixture, and the combination of these modified elementary qualities on the one hand, and the effects of medicaments that were taken not to be explicable in this manner.1 Galen coined the expression that a medicament of the latter kind possesses the capacity of (...) acting "by its whole substance,"2 and the question of how actions of the whole substance could be explicated gave rise to heated controversies in early modern pharmacology. Did Galen just... (shrink)