Aristotle, Problemata Mechanika, 1831

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            <p n="1">
              <s id="g0110101">
                <pb xlink:href="080/01/001.jpg" ed="Bekker" n="847a"/>
              Θαυμάζεται τῶν μὲν κατὰ φύσιν συμβαινόντων, ὅσων
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              ἀγνοεῖται τὸ αἴτιον, τῶν δὲ παρὰ φύσιν, ὅσα γίνεται διὰ
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              τέχνην πρὸς τὸ συμφέρον τοῖς ἀνθρώποις.</s>
              <s id="g0110102">ἐν πολλοῖς γὰρ
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              ἡ φύσις ὑπεναντίον πρὸς τὸ χρήσιμον ἡμῖν ποιεῖ· </s>
              <s id="g0110103">ἡ μὲν
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              γὰρ φύσις ἀεὶ τὸν αὐτὸν ἔχει τρόπον καὶ ἁπλῶς, τὸ δὲ
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              χρήσιμον μεταβάλλει πολλαχῶς.</s>
            </p>
            <p n="2">
              <s id="g0110201">ὅταν οὖν δέῃ τι παρὰ
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              φύσιν πρᾶξαι, διὰ τὸ χαλεπὸν ἀπορίαν παρέχει καὶ δεῖται
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              τέχνης. </s>
              <s id="g0110201a">διὸ καὶ καλοῦμεν τῆς τέχνης τὸ πρὸς τὰς τοιαύτας
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              ἀπορίας βοηθοῦν μέρος μηχανήν.</s>
              <s id="g0110202">καθάπερ γὰρ ἐποίησεν
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              Ἀντιφῶν ὁ ποιητής, οὕτω καὶ ἔχει· τέχνῃ γὰρ κρατοῦμεν,
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              ὧν φύσει νικώμεθα.</s>
              <s id="g0110203">τοιαῦτα δέ ἐστιν ἐν οἷς τά τε ἐλάττονα
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              κρατεῖ τῶν μειζόνων, καὶ τὰ ῥοπὴν ἔχοντα μικρὰν κινεῖ
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              βάρη μεγάλα, καὶ πάντα σχεδὸν ὅσα τῶν προβλημάτων
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              μηχανικὰ προσαγορεύομεν.</s>
            </p>
            <p n="3">
              <s id="g0110301">ἔστι δὲ ταῦτα τοῖς φυσικοῖς
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              προβλήμασιν οὔτε ταὐτὰ πάμπαν οὔτε κεχωρισμένα λίαν,
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              ἀλλὰ κοινὰ τῶν τε μαθηματικῶν θεωρημάτων καὶ τῶν
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              φυσικῶν· τὸ μὲν γὰρ ὣς διὰ τῶν μαθηματικῶν δῆλον, τὸ
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              δὲ περὶ ὃ διὰ τῶν φυσικῶν.</s>
            </p>
            <p n="4">
              <s id="g0120101">περιέχεται δὲ τῶν ἀπορουμένων</s>
            </p>
          </chap>
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