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CUm enim varietas parti∣um foret accidentalis, posset proprietas unius cujusli∣bet in aliâ ejusdem magnitudi∣nis reperiri. Manifestum ita{que} est, partem unam non esse ali∣am à qualiber ejusdem magni∣tudinis per vel propter varie∣tatem talium accidentium.
a 1.1 Quare, cùm propter situm eti∣am non sint distinctae, non est una aliqua pars quae possit si∣tum mutare; non itaque posset hujusmodi corpus secundum partes motum intelligi.
Prop. 19.