This journal provides immediate access to some articles. Volume 36(5); May 1950 Bacteriology Strain Specificity and Production of Antibiotic Substances: IX. Bacteriostatic and Bactericidal Properties of Neomycin and Development of Resistant Strains PMCID: PMC1063186 Botany Antibiotic Substances from Basidiomycetes: VII. Clitocybe Illudens PMCID: PMC1063187 Unilateral Nuclear Migration and the Interactions of Haploid Mycelia in the Fungus Cyathus Stercoreus PMCID: PMC1063188 Genetics The Action of Allelic Forms of the Gene A in Maize: III. Studies on the Occurrence of Isoquercitrin in Brown and Purple Plants and its Lack of Identity with the Brown Pigments PMCID: PMC1063189 Mathematics Determination of the Spectrum of the Flow of Brownian Motion PMCID: PMC1063190 Physics The Crystallographic Symmetries Determinable by X-Ray Diffraction PMCID: PMC1063191 The Photography of Atoms in Crystals PMCID: PMC1063192 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||