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Letter 7609

Darwin, C. R. to Greg, W. R.

21 Mar [1871]

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    Comments on WRG's MS on ratio of the sexes at birth.

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    Offers to send J. M. A. Thury's paper ["Loi de production des sexes", Arch. Sci. Phys. & Nat. 18 (1863): 91–8].

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