This journal provides immediate access to some articles. Volume 40(2); February 1954 Bacteriology CYCLICAL BEHAVIOR IN PNEUMOCOCCAL GROWTH AND TRANSFORMABILITY OCCASIONED BY ENVIRONMENTAL CHANGES PMCID: PMC527939 DOUBLE MARKER TRANSFORMATIONS AS EVIDENCE OF LINKED FACTORS IN DESOXYRIBONUCLEATE TRANSFORMING AGENTS PMCID: PMC527940 Biochemistry THE ISOLATION AND IDENTIFICATION OF THE MAJOR ANION FRACTION OF THE AXOPLASM OF SQUID GIANT NERVE FIBERS PMCID: PMC527941 Chemistry DIELECTRIC INCREMENTS IN AQUEOUS SOLUTIONS OF SYNTHETIC POLYELECTROLYTES PMCID: PMC527942 THE RATES OF REACTION BETWEEN ALKYL HALIDES AND TERTIARY AMINES AS DETERMINED CONDUCTOMETRICALLY PMCID: PMC527943 Engineering SONIC POINT ON SUPERSONIC AIRFOILS PMCID: PMC527944 REAR SHOCK AND PRESSURE ON SUPERSONIC AIRFOILS PMCID: PMC527945 Genetics GENETIC CHANGES IN AMERICAN POPULATIONS OF DROSOPHILA MELANOGASTER PMCID: PMC527946 PSEUDO-ALLELISM AT THE VERMILION LOCUS IN DROSOPHILA MELANOGASTER PMCID: PMC527947 Geophysics NUMERICAL PREDICTION OF CYCLOGENESIS PMCID: PMC527948 Mathematics ARITHMETIC GENERA AND THE THEOREM OF RIEMANN-ROCH FOR ALGEBRAIC VARIETIES PMCID: PMC527949 ON THE CONTINUOUS GOLD-MINING EQUATION PMCID: PMC527950 ON A PARTICULAR TYPE OF CONVERGENCE TO A SINGULAR MATRIX PMCID: PMC527951 ON NON-NEGATIVE-VALUED MATRICES PMCID: PMC527952 Physics SOME RELATIONS FOR CRYSTALS WITH SUBSTRUCTURES PMCID: PMC527953 ON DIFFRACTION BY A STRIP PMCID: PMC527954 THE QUANTUM CORRECTION IN THE RADIATION BY ENERGETIC ACCELERATED ELECTRONS PMCID: PMC527955 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||