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 Jamaica race mixing photo set provided by Isaac Costa, with Karl Pearson's handwritten instructions for publication in Biometrika (vol. 6:4), multiple pages (#1965)
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 Jon Alfred Mjøen, director of the Vindern Biological Laboratory (Oslo, Norway) explaining pedigree to children Heljar, Sonja, and Fridtjof (#1580)
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 Karl Pearson cover letter for study on "Hereditary Transmission of Disease and Temperment" (version 2), multiple pages (#1927)
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 Karl Pearson review of R.H. Johnson paper submitted to Nature, multiple pages (#71)
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 K. Bathurst letter to Francis Galton, about family records (10/12/1895), multiple pages (#2082)
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 K. Pearson cover letter for study on "Hereditary Transmission of Disease and Temperment" (version 1), multiple pages (#1925)
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 Lathrop Brown speech to House of Representatives about immigration, multiple pages (#379)
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 "Laws Against Cousin Marriage: Would Eugenicists Alter Them?" (C. Davenport, H. Hunt, and G. Shull), Eugenics: A Journal of Race Betterment (vol II:8) (#1732)
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 Leonard Darwin letter to Charles Davenport about sterilization, multiple pages (#438)
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 Letter from German Society for Race Hygiene to Leonard Darwin about International Commission for Eugenics, multiple pages (#441)
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 Lucien Howe letter to Charles Davenport about Mendel's Centennial (#324)
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Leading Eugenicists