Table of Contents

• Stanley Cohen
• and Rita Levi-Montalcini

A NERVE GROWTH-STIMULATING FACTOR ISOLATED FROM SNAKE VENOM

• Joshua Lederberg

BACTERIAL PROTOPLASTS INDUCED BY PENICILLIN

• William Oroshnik,
• Paul K. Brown,
• Ruth Hubbard,
• and George Wald

HINDERED CIS ISOMERS OF VITAMIN A AND RETINENE: THE STRUCTURE OF THE NEO-b ISOMER

• Donald F. Steiner
• and H. S. Anker

ON THE SYNTHESIS OF ANTIBODY PROTEIN IN VITRO

• Norton D. Zinder
• and William F. Arndt

PRODUCTION OF PROTOPLASTS OF ESCHERICHIA COLI BY LYSOZYME TREATMENT

• Mario Azzarri
• and Charles A. Kraus

ION ASSOCIATION IN AQUEOUS SOLUTIONS OF 1-1 ELECTROLYTES AT 25°

• William Moffitt
• and Jen Tsi Yang

THE OPTICAL ROTATORY DISPERSION OF SIMPLE POLYPEPTIDES. I

• T. Y. Thomas

ISOTROPIC MATERIALS WHOSE DEFORMATION AND DISTORTION ENERGIES ARE EXPRESSIBLE BY SCALAR INVARIANTS

• William Hovanitz

CYTOLOGICAL DEMONSTRATION OF THE HELICAL STRUCTURE OF GIANT CHROMOSOMES

• Laura Garnjobst
• and James F. Wilson

HETEROCARYOSIS AND PROTOPLASMIC INCOMPATIBILITY IN NEUROSPORA CRASSA

• P. D. Skaar
• and Alan Garen

THE ORIENTATION AND EXTENT OF GENE TRANSFER IN ESCHERICHIA COLI

• A. A. Albert

A PROPERTY OF SPECIAL JORDAN ALGEBRAS

• Richard Bellman

ON A CLASS OF FUNCTIONAL EQUATIONS OF MODULAR TYPE

• Richard Bellman
• and Robert Kalaba

ON THE PRINCIPLE OF INVARIANT IMBEDDING AND PROPAGATION THROUGH INHOMOGENEOUS MEDIA

• Samuel Bourne

ON MULTIPLICATIVE IDEMPOTENTS OF A POTENT SEMIRING

• Earl A. Coddington

GENERALIZED RESOLUTIONS OF THE IDENTITY FOR CLOSED SYMMETRIC ORDINARY DIFFERENTIAL OPERATORS

• Leon Ehrenpreis

CAUCHY'S PROBLEM FOR LINEAR DIFFERENTIAL EQUATIONS WITH CONSTANT COEFFICIENTS

• Luther P. Eisenhart

A UNIFIED THEORY OF GENERAL RELATIVITY OF GRAVITATION AND ELECTROMAGNETISM. II

• J. J. Kohn

SINGULAR INTEGRAL EQUATIONS FOR DIFFERENTIAL FORMS ON RIEMANNIAN MANIFOLDS

• John McCarthy

MEASURES OF THE VALUE OF INFORMATION

• H. S. Vandiver

DIOPHANTINE EQUATIONS IN CERTAIN RINGS

• Kenneth S. Pitzer

A FUNDAMENTAL THEORY OF SUPERCONDUCTIVITY

• I. E. Segal

CONVERGENT APPROACH TO THE THEORY OF ELEMENTARY PARTICLE INTERACTIONS

• Victor G. Bruce
• and Colin S. Pittendrigh

TEMPERATURE INDEPENDENCE IN A UNICELLULAR “CLOCK”

• Henry C. Sherman,
• Constance S. Pearson,
• Mary E. R. Bal,
• Andrea McCarthy,
• and Caroline Sherman Lanford

INFLUENCE OF PROTEIN AND CALCIUM ADDITIONS TO ALREADY ADEQUATE DIET

• C. A. Terzuolo
• and T. H. Bullock

MEASUREMENT OF IMPOSED VOLTAGE GRADIENT ADEQUATE TO MODULATE NEURONAL FIRING

• Rita Levi-Montalcini
• and Stanley Cohen

IN VITRO AND IN VIVO EFFECTS OF A NERVE GROWTH-STIMULATING AGENT ISOLATED FROM SNAKE VENOM

• P. J. Wangersky
• and W. J. Cunningham

ON TIME LAGS IN EQUATIONS OF GROWTH

COURSE OF PRODUCTION OF AN ISOANTISERUM EFFECTING TUMOR HOMOGRAFT SURVIVAL IN MICE