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This journal provides immediate access to some articles. Volume 34(7); July 1948 Astronomy Reflection Effect in Eclipsing Binaries for a Point-Source of Light PMCID: PMC1079116 Bacteriology The Stimulatory Action of Certain Fractions from Bacteria and Yeast on the Formation of a Bacterial Virus PMCID: PMC1079117 Biochemistry Vitamin K5 as an Inhibitor of the Growth of Fungi and of Fermentation by Yeast PMCID: PMC1079118 Genetics Inactivation of Enzyme-Substrate Films by Small Doses of X-Rays PMCID: PMC1079119 Mathematics Notes on Integration: I PMCID: PMC1079120 Physics On the Differential Equations of Slip Flow PMCID: PMC1079121 Correction Multiply Valued Harmonic Functions: Green's Theorem PMCID: PMC1079122 Corrects: Multiply Valued Harmonic Functions. Proc Natl Acad Sci U S A. 1947 September; 33(9): 270–275. Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||