§. III.
Qualitates illae, quae vulgo tactiles * 1.1 vocantur, uti mollities, durities &c. dependent vel à varia conditione superficiei objectorum, vel à vario situ, figura & connexione partium omnium corporis.
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Qualitates illae, quae vulgo tactiles * 1.1 vocantur, uti mollities, durities &c. dependent vel à varia conditione superficiei objectorum, vel à vario situ, figura & connexione partium omnium corporis.
Sic corpus solidum, prout partes habet * 1.2 varie conformatas, ita vel molle est vel durum, vel flexile vel fragile vel ductile. Et quemadmodum mollia corpora fa∣cilius penetrat materia subtilis, quam dura, ita fragilium partes sese velut in puncto tangunt, flexibilium autem & ductilium particulae magis sibi mutuo implexae sunt. Vitrum quidem fragilius est, sed durius plumbo, quod partes vi∣tri sese velut in puncto tangant, sed plumbi ut & auri partes sunt magis ramosae. Phil. Burg. p. 1. c. ult.
Qualitates qu•• tactiles vocantur, unde depen∣dent!
Corpora mollia dura, fragil••a, fle∣xibilia & ductilia.