|| "Calvin Blackman Bridges (January 11, 1889 - December 27, 1938) was an American scientist, known for his contributions to the field of genetics. Along with Alfred Sturtevant and H.J. Muller, Bridges was part of the famous fly room of Thomas Hunt Morgan at Columbia University." Wikipedia. 46 offprints. Complete listing of offprints available. Early titles included:Non_Disjunction as Proof of the Chromosome Theory of Heredity (1913) ex-library with stamp and duplicate stamp, Karl Sax stamp, else good.; Non-Disjunction of the Sex Chromosomes of Drosophila (1913) some creasing and edge-tears; Direct Proof Through Non-Disjunction That the Sex-linked Genes of Drosophila are Borne by the X-Chromosome (1914) some tearing and chipping to edges; The Chromosome Hypothesis of Linkage Applied to Cases in Sweet Peas and Primula (1914) Franz Schrader ownership signature front wrapper; Deficiency (1917) J.T. Baldwin Jr. stamp; Maroon - A Recurrent Mutation in Drosophila (1918) Inscribed presentation copy in pencil to Franz Schrader, signed by C. B. Bridges, chip to bottom corners, else good.; The Developmental stages at which mutations occur in the germ tract (1919) J. T. Baldwin stamp; and many others. Most are in good to very good condition, some have tearing and minor chipping, most have "Bridges, C. B." in pencil or ink with years. * Genetics. Science.