Abstract
Chapter 5 is the introductory chapter to Part II, which discusses Fabri’s theory of natural motion. The subject of natural motion (or free fall) was the focus of the extensive debate inaugurated by Galileo’s crucial discoveries; this preliminary chapter presents the general historical context in which this important discourse took place – a debate labeled by historian Paolo Galluzzi the “Second Galilean Affair” (the first one being Galileo’s famous trial).
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Notes
- 1.
See beginning of Chapter 1 and also Section 4.2 above.
- 2.
As was explained in Part I – and will be further clarified in Parts II and III – Fabri’s concept of impetus in fact differs substantially from any “traditional” version of it.
- 3.
“Multi sane hactenus in hac materia feliciter desudarunt; & quidem prae caeteris magnus ille Galileus, qui mirifica, & fere divina ingeni iacie, motum localem eo perduxit, quo mortalium nemo perduxerat; quia tamen multa omisit, quae ad motum spectant, ut nemo nescit; nec ex principiis Physicis mirabiles illos effectus demonstravit, sed tantum certis quibusdam proportionibus ex geometricis addixit; ut Physicae consulamus, aliam inimus viam: Geometriam quidem adhibemus, ad explicandas, exponendasque praedictas illas proportiones, quae motibus insunt; sed effectus illos praedictis proportionibus affixos ad principia Physica reducimus; id est, cum supponamus quod sint, propter quid sint demonstramus” (Fabri 1646, praefatio, p. 5). My emphasis (in the last sentence); see also Chapter 1 above, Note 1.
- 4.
Galilei 1989, pp. 153–154, 167–169.
- 5.
See Mancosu 1996, pp. 10–12.
References
Fabri, Honoré. 1646. Tractatus physicus de motu locali, in quo effectus omnes, qui ad impetum, motum naturalem, violentum, & mixtum pertinent, explicantur, & ex principiis physicis demonstrantur; auctore Petro Mousnerio Doctore Medico; cuncta excerpta ex praelectionibus R. P. Honorati Fabry, Societatis Iesu. Lyon.
Feldhay, Rivka. 1998. The Use and Abuse of Mathematical Entities: Galileo and the Jesuits Revisited. In The Cambridge Companion to Galileo, ed. Peter Machamer, 80–145. Cambridge: Cambridge University Press.
Galilei, Galileo. 1953. Dialogue on the Great World Systems: In the Salusbury Translation, ed. Giorgio De Santillana (trans: Salusbury, T.). Chicago, IL: University of Chicago Press.
Galilei, Galileo. 1989. Two New Sciences (trans: Drake, S.). Toronto: Wall & Emerson.
Galluzzi, Paolo. 2001. Gassendi and l’affaire Galilée of the Laws of Motion. In Galileo in Context, ed. Jürgen Renn, 239–275. Cambridge: Cambridge University Press.
Mancosu, Paolo. 1996. Philosophy of Mathematics & Mathematical Practice in the Seventeenth Century. New York, NY: Oxford University Press.
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Elazar, M. (2011). Fabri and the “Second Galilean Affair”. In: Honoré Fabri and the Concept of Impetus: A Bridge between Paradigms. Boston Studies in the Philosophy of Science, vol 288. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-1605-6_6
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