DescriptionHamilton Lectures on Logic 1874 Euler Diagrams.png
English: Euler diagrams and description from Hamilton's Lecture on Logic XIV, ascribing their invention to Christian Weise in 1712.
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Adapted from Lectures of Metaphysics and Logic, Vol. 4: Lectures on Logic Vol. 1, 3rd ed. Ed. by Mansel & Veitch. Edinburgh, Blackwood, 1874, pp. 255-256. Original publication 1860. https://books.google.com/books?id=61EyAQAAMAAJ
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