This journal provides immediate access to some articles. Volume 40(12); December 1954 Astronomy Interstellar Hydrogen and the Local System PMCID: PMC1063974 On the Origin of the Lunar Surface Features PMCID: PMC1063975 Bacteriology The Role of Nutrition in the Host-Parasite Relationship PMCID: PMC1063976 Genetics The Relation between Modulator and Activator in Maize PMCID: PMC1063977 An Allele of the S(s) Blood Group Genes PMCID: PMC1063978 Chromosome Shattering by Ultraviolet Radiation (2650 A) PMCID: PMC1063979 The Nature of the Pigment Induced by Chromogenic Inductors of Serratia Marcescens PMCID: PMC1063980 The Effects of Pre- and Postirradiation Centrifugation on the Chromosomes of Tradescantia and Vicia PMCID: PMC1063981 Mathematics Positive Zonal Functions on Spheres PMCID: PMC1063982 Kählerian Coset Spaces of Semisimple Lie Groups PMCID: PMC1063983 The Green's and Neumann's Problems for Differential Forms on Riemannian Manifolds PMCID: PMC1063984 Ergodic Property of the Brownian Motion Process PMCID: PMC1063985 Physics On the Possibility of Electromagnetic Surface Waves PMCID: PMC1063986 Correction Ovarian Hormones and the Ionic Balance of Uterine Muscle PMCID: PMC1063987 Corrects: OVARIAN HORMONES AND THE IONIC BALANCE OF UTERINE MUSCLE. Proc Natl Acad Sci U S A. 1954 June; 40(6): 515–521. Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||