Table of Contents

• Preston E. Cloud, Jr.

N.A.S. Symposium on the Evolution of the Earth's Atmosphere: CHAIRMAN'S SUMMARY REMARKS

• Heinrich D. Holland

N.A.S. Symposium on the Evolution of the Earth's Atmosphere: THE HISTORY OF OCEAN WATER AND ITS EFFECT ON THE CHEMISTRY OF THE ATMOSPHERE

• Barry Commoner

N.A.S. Symposium on the Evolution of the Earth's Atmosphere: BIOCHEMICAL, BIOLOGICAL, AND ATMOSPHERIC EVOLUTION

• Charles F. Davidson

N.A.S. Symposium on the Evolution of the Earth's Atmosphere: GEOCHEMICAL ASPECTS OF ATMOSPHERIC EVOLUTION

• Alfred G. Fischer

N.A.S. Symposium on the Evolution of the Earth's Atmosphere: FOSSILS, EARLY LIFE, AND ATMOSPHERIC HISTORY

• L. V. Berkner
• and L. C. Marshall

N.A.S. Symposium on the Evolution of the Earth's Atmosphere: HISTORY OF MAJOR ATMOSPHERIC COMPONENTS

• Bryant A. Miner
• and Henry Eyring

THE APPLICATION OF SIGNIFICANT STRUCTURE THEORY TO BINARY LIQUID MIXTURES: AR + N₂, AR + O₂, AND O₂ + N₂

• L M Krausz
• and W Kauzmann

The relationship between the densitometric and dilatometric volume changes of ribonuclease accompanying a change in pH

• S A Bernhard
• and H Gutfreund

The optical detection of transients in trypsin- and chymotrypsin-catalyzed reactions

• T E Barman
• and H Gutfreund

The application of the rapid-flow sampling technique to the chemical identification of intermediates in trypsin-catalyzed reactions

• A J Bearden,
• T H Moss,
• W S Caughey,
• and C A Beaudreau

Mössbauer spectroscopy of heme and hemin compounds

• W Bloom
• and S Ozarslan

Electron microscopy of ultraviolet-irradiated parts of chromosomes

• J R Raper,
• D H Boyd,
• and C A Raper

Primary and secondary mutations at the incompatibility loci in Schizophyllum

• P E Hartman,
• C Rusgis,
• and R C Stahl

Orientation of the histidine operon in the Salmonella typhimurium linkage map

• K E Sanderson

Information transfer in Salmonella typhimurium

• R F Grell
• and A C Chandley

Evidence bearing on the coincidence of exchange and DNA replication in the oöcyte of Drosophila melanogaster

• K Kjellin-Straby
• and H G Boman

Studies on microbial RNA, 3. Formation of submethylated sRNA in Saccharomyces cerevisiae

• H V Gelboin,
• M Klein,
• and R R Bates

Inhibition of mouse skin tumorigenesis by actinomycin D

• H Green
• and B Goldberg

Synthesis of collagen by mammalian cell lines of fibroblastic and nonfibroblastic origin

• C F Schmidt

Pharmacological support for man on long space flights

• L E Hokin

Autoradiographic localization of the acetylcholine-stimulated synthesis of phosphatidylinositol in the superior cervical ganglion

• P C Ward,
• C Edwards,
• and E S Benson

Relation between adenosinetriphosphate activity and sarcomere length in stretched glycerol-extracted frog skeletal muscle

• R Lorente de Nó
• and V Honrubia

Theory of the flow of action currents in isolated myelinated nerve fibers. II

• J R Wilson,
• N Adler,
• and B Le Boeuf

The effects of intromission frequency on successful pregnancy in the female rat

• T Cremona,
• J Kowal,
• and B L Horecker

The mechanism of action of aldolases. XI. Activation by aromatic sulfhydryl reagents and beta-elimination of selected thiol groups

• N Hilschmann
• and L C Craig

Amino acid sequence studies with Bence-Jones proteins

• H A Lardy,
• V Paetkau,
• and P Walter

Paths of carbon in gluconeogenesis and lipogenesis: the role of mitochondria in supplying precursors of phosphoenolpyruvate

• R G Hart

Surface features of the 50S ribosomal component of Escherichia coli

• M C Evans
• and B B Buchanan

Photoreduction of ferredoxin and its use in carbon dioxide fixation by a subcellular system from a photosynthetic bacterium

• F Pochon
• and A M Michelson

Polynucleotides. VI. Interaction between polyguanylic acid and polycytidylic acid

• J K Setlow,
• M E Boling,
• and F J Bollum

The chemical nature of photoreactivable lesions in DNA

• P A Marks,
• E R Burka,
• F M Conconi,
• W Perl,
• and R A Rifkind

Polyribosome dissociation and formation in intact reticulocytes with conservation of messenger ribonucleic acid

• L D Garren,
• R L Ney,
• and W W Davis

Studies on the role of protein synthesis in the regulation of corticosterone production by adrenocorticotropic hormone in vivo

• H Jehle

Replication of double-strand nucleic acids

• F Imamoto,
• T Yamane,
• and N Sueoka

Existence of two phenylalanyl-sRNA synthetases in Neurospora crassa

• W E Barnett

Interspecies aminoacyl-sRNA formation: fractionation of Neurospora enzymes involved in anomalous aminoacylation

• R Weil,
• M R Michel,
• and G K Ruschmann

Induction of cellular DNA synthesis by polyoma virus

• H Yoshikawa

DNA synthesis during germination of Bacillus subtilis spores

• W S Hayward
• and W L Belser

Regulation of pyrimidine biosynthesis in Serratia marcescens

• G Attardi,
• P C Huang,
• and S Kabat

Recognition of ribosomal RNA sites in DNA. I. Analysis of the E. coli system

• C. L. Pekeris

ASYMPTOTIC THEORY OF THE FREE TORSIONAL OSCILLATIONS OF THE EARTH

• G. Stephen Jones

STABILITY AND ASYMPTOTIC FIXED-POINT THEORY

• H. T. Mathews

CLUSTER SETS AT ISOLATED AND NONISOLATED SINGULARITIES

• Bob E. Ellison

LIMITS OF INFINITE POPULATIONS UNDER RANDOM MATING

• Felix E. Browder

FIXED-POINT THEOREMS FOR NONCOMPACT MAPPINGS IN HILBERT SPACE

• Melvyn S. Berger

A STURM-LIOUVILLE THEOREM FOR NONLINEAR ELLIPTIC PARTIAL DIFFERENTIAL EQUATIONS

• L. Brillouin

THE ACTUAL MASS OF POTENTIAL ENERGY, II

• Frank C. Andrews

ON THE NATURE OF THE SPECTRUM OF THE TIME CORRELATION FUNCTION MATRIX FOR STOCHASTIC PROCESSES

• Demetrios G. Magiros

ON STABILITY DEFINITIONS OF DYNAMICAL SYSTEMS

• H. Kende

KINETINLIKE FACTORS IN THE ROOT EXUDATE OF SUNFLOWERS

• David C. Fork
• and Wolfgang Urbach

EVIDENCE FOR THE LOCALIZATION OF PLASTOCYANIN IN THE ELECTRON-TRANSPORT CHAIN OF PHOTOSYNTHESIS

• Jens Clausen

MICROLIMATIC AND VEGETATIONAL CONTRASTS WITHIN A SUBALPINE VALLEY

• Emanuel Epstein
• and D. W. Rains

CARRIER-MEDIATED CATION TRANSPORT IN BARLEY ROOTS: KINETIC EVIDENCE FOR A SPECTRUM OF ACTIVE SITES

ON THE STABILITY OF STOCHASTIC DYANMICAL SYSTEMS