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  1. Conjectures concerning the cause, and observations upon the phaenomena of earthquakes.
    By: Michell, John.
    Publication info: London :[s.n.],1760.
    Contributed by: Cambridge University Library
    BHL Collections: Charles Darwin's Library
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  2. Conjectures concerning the cause, and observations upon the phaenomena of earthquakes. : [Supplementary material in Charles Darwin's copy].
    By: Darwin, Charles, - Michell, John.
    Contributed by: Cambridge University Library
    BHL Collections: Charles Darwin's Library
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