This journal provides immediate access to some articles. Volume 36(7); July 1950 Genetics A New Type of Self-Sterility in Plants PMCID: PMC1063203 “Repeats” and the Modern Theory of the Gene PMCID: PMC1063204 Absence of Mutagenic Action of X-Rayed Cytoplasm in Habrobracon PMCID: PMC1063205 Mathematics A Note on the Exceptional Jordan Algebra PMCID: PMC1063206 On the Singular Values of a Product of Completely Continuous Operators PMCID: PMC1063207 Physics Some New Functions of Interest in X-Ray Crystallography PMCID: PMC1063208 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||