This journal provides immediate access to some articles. Volume 40(7); July 1954 Article NATIONAL ACADEMY OF SCIENCES: July 1, 1954 PMCID: PMC528008 Astronomy FLUCTUATIONS IN THE SPACE DISTRIBUTION OF THE GALAXIES PMCID: PMC527992 MAGELLANIC CLOUDS. XIII. COMPARISON OF MAGELLANIC AND GALACTIC ECLIPSING VARIABLES PMCID: PMC527993 Chemistry THE DIFFUSION COEFFICIENTS OF THE ALKALI METAL CHLORIDES AND POTASSIUM AND SILVER NITRATES IN DILUTE AQUEOUS SOLUTIONS AT 25° PMCID: PMC527994 Engineering THE SHOCK TUBE IN AERODYNAMIC AND STRUCTURAL RESEARCH PMCID: PMC527995 GRID ROTATION IN LÜDERS BANDS PMCID: PMC527996 A DISCUSSION OF THE LOAD DROP AND RELATED MATTERS ASSOCIATED WITH THE FORMATION OF A LÜDERS BAND PMCID: PMC527997 Genetics THE RELATION BETWEEN X-RAY DOSAGE AND THE FREQUENCY OF SIMULATED HEALING OF CHROMOSOME BREAKAGES IN DROSOPHILA MELANOGASTER FEMALES PMCID: PMC527998 Mathematics ON TORSION IN LIE GROUPS PMCID: PMC527999 VALUATION EQUILIBRIUM AND PARETO OPTIMUM PMCID: PMC528000 INTERDEPENDENCE OF THE YIELD CONDITION AND THE STRESS-STRAIN RELATIONS FOR PLASTIC FLOW PMCID: PMC528001 A GENERALIZATION OF THE FRÉCHET DISTANCE OF TWO CURVES PMCID: PMC528002 ESTIMATION OF THE COMPONENTS OF STOCHASTIC STRUCTURES PMCID: PMC528003 Pathology & Bacteriology THE TEMPERATURE-PRESSURE-INHIBITOR RELATIONS OF BACTERIAL LUMINESCENCE IN VITRO PMCID: PMC528004 Physics REPRESENTATIONS OF THE ANTICOMMUTATION RELATIONS PMCID: PMC528005 REPRESENTATIONS OF THE COMMUTATION RELATIONS PMCID: PMC528006 Zoölogy NOTE ON A “PERMANENT” EXPERIMENTAL ALTERATION OF GENETIC CONSTITUTION IN A NATURAL POPULATION PMCID: PMC528007 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||