Combining Texts

You have chosen 'Theory of Science (4 vols)' by Bernard Bolzano, 'On the Conservation of Force' by Hermann von Helmholtz and 'The Methods of Ethics (7th edn)' by Henry Sidgwick

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All the ideas for Aesthetics, or select a subheading:
      A. Aesthetic Experience
      B. Nature of Art
      C. Artistic Issues