Combining Texts

You have chosen 'The Universe as We Find It' by John Heil, 'On the Conservation of Force' by Hermann von Helmholtz and 'Letters to Lelong' by Gottfried Leibniz

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All the ideas for Modes of Existence, or select a subheading:
      A. Relations
      B. Properties
      C. Powers and Dispositions
      D. Universals
      E. Nominalism