This journal provides immediate access to some articles. Volume 34(9); September 1948 Bacteriology On the Stability of Nutritional Mutants of Bacteria PMCID: PMC1079139 Genetics A Method for Selection of Biochemical Mutants of Neurospora PMCID: PMC1079140 A Predictable Mutation in Bacteria PMCID: PMC1079141 Mathematics A Convexity Theorem PMCID: PMC1079142 Notes on Integration: II PMCID: PMC1079143 Physics Some Preliminary Results on the Spectra of AsH3, AsD3 and PH3 PMCID: PMC1079144 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||