Pamphlet. Condition: Collectible; Very Good. Prompt Shipment, shipped in Boxes, Tracking PROVIDEDOffprint. The Distribution of Chromosomes in Tetraploid Daturas,? ?The Assortment of Chromosomes in Triploid Daturas,? ?On the Time of Segregation of Genetic Factors in Plants.? Some with stamp of Karl Sax Biological Lab. First separate edition. Offprint. Original wrappers.*.