This journal provides immediate access to some articles. Volume 41(1); January 15, 1955 Biochemistry EXTRACTION OF COLLAGEN FROM CONNECTIVE TISSUE BY NEUTRAL SALT SOLUTIONS PMCID: PMC528012 Chemistry TOPOLOGICAL PROPERTIES OF COILED HELICAL SYSTEMS PMCID: PMC528013 THE ASSOCIATION OF IONS IN DIOXANE-WATER MIXTURES AT 25° PMCID: PMC528014 Genetics A TEST FOR RECOMBINATIONAL LETHALS IN THE X-CHROMOSOME OF DROSOPHILA MELANOGASTER PMCID: PMC528015 Geophysics WAVES WITH Pn AND Sn VELOCITY AT GREAT DISTANCES PMCID: PMC528016 ON THE ORIGIN OF TEKTITES PMCID: PMC528017 Mathematics DYNAMIC PROGRAMMING AND A NEW FORMALISM IN THE THEORY OF INTEGRAL EQUATIONS PMCID: PMC528018 ARITHMETIC GENERA OF NORMAL VARIETIES IN AN ALGEBRAIC FAMILY PMCID: PMC528019 ON GENERATING FUNCTIONS FOR RESTRICTED PARTITIONS OF RATIONAL INTEGERS PMCID: PMC528020 ON THE TRANSCENDENTAL MODULI OF ALGEBRAIC RIEMANN SURFACES PMCID: PMC528021 ON MONOTONIC FUNCTIONS WHOSE SPECTRUM IS A CANTOR SET WITH CONSTANT RATIO OF DISSECTION PMCID: PMC528022 Zoölogy RADIOAUTOGRAPHIC STUDIES OF KERATIN FORMATION PMCID: PMC528023 THE CEPHALOCARIDA, A NEW SUBCLASS OF CRUSTACEA FROM LONG ISLAND SOUND PMCID: PMC528024 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||