1. Studies on Blood: The Vitally Stainable Granules As a Specific Criterion for Erythroblasts and the Differentiation of the Three Strains of White Blood-Cells As Seen in the Living Chick's Yolk-Sac Publication: Johns Hopkins University, October 1921 Subject(s): ErythrocytesLymphocytesMonocytesLeukocytesStem CellsEmbryologyAnatomy Archival Collection: The Florence R. Sabin Papers (Profiles in Science)