Raymond Pearl spent the majority of his academic career (1918-1940) at Johns Hopkins University, where he was Professor of Biometry and Vital Statistics and Director of the Institute of Biological Research. Founder of the Quarterly Review of Biology and Human Biology, he made significant contributions in the areas of biology, genetics, eugenics, and statistics. The Pearl Papers includes correspondence as well as notebooks, scrapbooks, diplomas, photographs, and 33 volumes of diaries. There is significant correspondence with his wife, Maud (ca. 500 letters), and mother, Ida May (ca. 300 letters), particularly for the years 1895-1934. Of special note is Pearl's correspondence with his friend, colleague, and fellow Baltimoreian, H. L. Mencken (ca. 500 letters). The collection contains important information on the American Association of Physical Anthropologists, The Baltimore Sun, the Birth Control Federation of America, Dartmouth College, the International Institute of Statistics, Johns Hopkins University, and the National Academy of Sciences. This note is currently under review for revision.

The population geneticist Hampton L. Carson spent the major part of his career at Washington University (1949-1963) and the University of Hawaii (1963-1985) investigating the cytogenetics and evolution of Drosophila. As one of the major figures in the Hawaii Drosophila project, he made particularly important contributions to the study of speciation and selective and non-selective evolutionary mechanisms. The Carson Papers (1921-1993) contain correspondence, subject files, manuscripts of published and unpublished works by Carson, papers by colleagues and students, research notes, course materials, photographs, and biographical information, which documents Carson's career as an evolutionary geneticist. The collection is organized into nine series.