Mutis explains the second rule in the following terms: ‘The second rule is that the effects of the same nature are produced by the same causes’ (III, 7, 1, 5, f. 284r). It is remarkable the lack of connection between Rule I and II, as they are explained by Mutis. Let us remember that Newton’s formulation of Rule II is presented as a consequence of the principle of simplicity established in Rule I: ‘Ideóque effectuum naturalium ejusdem generis eædem assignandæ sunt causæ, quâtenus fieri potest’ (Newton, 1713: 357). As Ducheyne has argued: ‘Given that Newton wrote “ideoque” at the beginning of Rule II, the second rule is to be conceived as a consequence of Rule I’ (2015: 145). Nevertheless, it is important to claim that the ‘ideoque’ [therefore]
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In the first case, he says that since we perceive that every time we rub two objects their temperature increase, it is possible to claim that friction is the cause of the increment of their temperature, no matter if they are different kinds of bodies. In the case of physical phenomena, Mutis exemplifies the second rule by explaining the universal character of gravity as it explains both the fall of objects on the earth and the motion of the planets around the …show more content…
Likewise, he had to use Newton’s Principia, in order to explain the particular phenomena which can be subsumed to the action of a gravitational force. As Ducheyne has argued: ‘By mobilizing Rules I and II in Proposition IV and V (and their scholia), Book III, Newton was entitled to claim that the inverse-square centripetal forces drawing the primary planets to the sun and those drawing the secondary planets to the earth, Jupiter or Saturn are instances of the same cause’ (2015: 146). Thus, though Mutis probably knew the Book III of Newton’s Principia only in the version of the first edition, which does not contain the rules, in this version it is possible to find Newton’s crossed-references for justifying the universalization of the force as the cause of both the motion of the planets around the sun and the fall of bodies on the arth. Let us take, as an example, Proposition V, where Newton argues that the force retaining secondary planets around the primary planets is the same as the one retaining primary planets around the sun: ‘Nam revolutions Planetarum circumjovialium circa Jovem, & Mercurii ac Veneris reliquorumque circumsolarium circa Solem sunt phænomena ejusdem generis cum revolution Lunæ circa Terreram; &
In the first case, he says that since we perceive that every time we rub two objects their temperature increase, it is possible to claim that friction is the cause of the increment of their temperature, no matter if they are different kinds of bodies. In the case of physical phenomena, Mutis exemplifies the second rule by explaining the universal character of gravity as it explains both the fall of objects on the earth and the motion of the planets around the …show more content…
Likewise, he had to use Newton’s Principia, in order to explain the particular phenomena which can be subsumed to the action of a gravitational force. As Ducheyne has argued: ‘By mobilizing Rules I and II in Proposition IV and V (and their scholia), Book III, Newton was entitled to claim that the inverse-square centripetal forces drawing the primary planets to the sun and those drawing the secondary planets to the earth, Jupiter or Saturn are instances of the same cause’ (2015: 146). Thus, though Mutis probably knew the Book III of Newton’s Principia only in the version of the first edition, which does not contain the rules, in this version it is possible to find Newton’s crossed-references for justifying the universalization of the force as the cause of both the motion of the planets around the sun and the fall of bodies on the arth. Let us take, as an example, Proposition V, where Newton argues that the force retaining secondary planets around the primary planets is the same as the one retaining primary planets around the sun: ‘Nam revolutions Planetarum circumjovialium circa Jovem, & Mercurii ac Veneris reliquorumque circumsolarium circa Solem sunt phænomena ejusdem generis cum revolution Lunæ circa Terreram; &