Race Mixing and Marriage Laws
141 objects illustrate this topic:

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The Senate is still Nordic," about how the decision-makers in the Senate are still those of Nordic descent (#1192)
"The South's fight for race purity," by R.W. Wooley, Pearson's Magazine, multiple pages (#676)
"The Tribe of Ishmael," by Arthur H. Estabrook, in Eugenics, Genetics and the Family (vol. 1), multiple pages (#1489)
"Triple Mixtures" (Caucasian-Indian-Negro) in Robeson County, North Carolina, from from Arthur Estabrook's scrapbook of field photographs, multiple pages (#1261)
T. S. Painter's exhibit "Chromosomes in man," 3rd International Eugenics Conference (#1080)
"Variation in skin-pigmentations among Jamaicans" (#983)
Virginia Act to Preserve Racial Integrity of 3/20/1924, multiple pages (#1239)
"White Indians of Panama," 3rd International Eugenics Conference (#1067)
"Why baby cannot be darker than the sum of the blackness of its mother and father," the Los Angeles Examiner (#459)
W. Plecker letters to A. Estabrook, about court case of a Colored woman who attempted to "pass for white" on marriage license (8/29/1924, 9/9/1924), multiple pages (#1294)
W. Plecker letter to anonymous, warning that registry of mixed race families would be scrutinized under the Viriginia Racial Integrity Act (7/29/1924), multiple pages (#1292)