A Discourse Presented to the Most Serene Don Cosimo II., Great Duke of Tuscany, Concerning the Natation of Bodies Vpon, and Submersion In, the Water.Galilei, Galileo
Science
A Discourse Presented to the Most Serene Don Cosimo II., Great Duke of Tuscany, Concerning the Natation of Bodies Vpon, and Submersion In, the Water.
Galilei, Galileo
Hydrostatics; Specific gravity
First in the order and disposure of the words of _Aristotle_, the
particle _Simpliciter_, or if you will _absoluté_, is conjoyned with
the Verb _to move_, and seperated from the Noun _Causes_, the which is
a great presumption in my favour, seeing that the writing and the Text
saith, Figures are not the Cause of moving simply upwards or
downwards, but of quicker or slower Motion: and, saith not, Figures
are not simply the Causes of moving upwards or downwards, and when the
words of a Text receive, transposed, a sence different from that which
they sound, taken in the order wherein the Author disposeth them, it
is not convenient to inverte them. And who will affirm that
_Aristotle_ desiring to write a Proposition, would dispose the words
in such sort, that they should import a different, nay, a contrary
sence? contrary, I say, because understood as they are written; they
say, that Figures are not the Causes of Motion, but inverted, they
say, that Figures are the Causes of Motion, &c.
Moreover, if the intent of _Aristotle_ had been to say, that Figures
are not simply the Causes of moving upwards or downwards, but only
Causes _Secundum quid_, he would not have adjoyned those words, _but
they are Causes of the more swift or slow Motion_; yea, the subjoining
this would have been not only superfluous but false, for that the
whole tenour of the Proposition would import thus much. Figures are
not the absolute Causes of moving upwards or downwards, but are the
absolute Cause of the swift or slow Motion; which is not true: because
the primary Causes of greater or lesser Velocity, are by _Aristotle_
in the 4th of his _Physicks_, _Text. 71._ attributed to the greater or
lesser Gravity of Moveables, compared among themselves, and to the
greater or lesser Resistance of the _Medium's_, depending on their
greater or less Crassitude: and these are inserted by _Aristotle_ as
the primary Causes; and these two only are in that place nominated:
and Figure comes afterwards to be considered, _Text. 74._ rather as an
Instrumentall Cause of the force of the Gravity, the which divides
either with the Figure, or with the _Impetus_; and, indeed, Figure by
it self without the force of Gravity or Levity, would opperate
nothing.
Public-domain text, read in full here on John Shaqi.
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