| | Opinion |  |
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| | The Other American Election 1
doi:10.1038/220001a0
PDF (229K)
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| | News | |
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| | Science Museums: What Manchester does Today 2
doi:10.1038/220002a0
PDF (239K)
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| | Industrial Innovation: Bridging the Gap 3
doi:10.1038/220003a0
PDF (118K)
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| | University Admissions: Who will Get into University? 4
doi:10.1038/220004a0
PDF (123K)
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| | Distinctions: Fermi Prize for Wheeler 4
doi:10.1038/220004b0
PDF (123K)
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| | Electrical Engineering: Turbogenerators keep Growing 4
doi:10.1038/220004c0
PDF (315K)
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| | Fuel Policy: Two More Views on Coal 5
doi:10.1038/220005a0
PDF (197K)
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| | Sponsored Research: Dividends for Societies 5
doi:10.1038/220005b0
PDF (324K)
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| | University Curriculum: Chemists into Economists 6
doi:10.1038/220006a0
PDF (133K)
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| | Environmental Noise: Non-destructive Testing 6
doi:10.1038/220006b0
PDF (301K)
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| | Exhibitions: Insects on Show 7
doi:10.1038/220007a0
PDF (384K)
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| | Environment: All Change for fhe Biosphere 8
doi:10.1038/220008a0
PDF (214K)
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| | British Floods: Who is to Blame? 8
doi:10.1038/220008b0
PDF (325K)
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| | Water Pollution: Cleaning Up the Trent 9
doi:10.1038/220009a0
PDF (116K)
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| | Scientific Manpower in Britain and the USA; the McCarthy Study 9
doi:10.1038/220009b0
PDF (238K)
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| | Ethics for and by Biologists 11
Our Special Correspondent
doi:10.1038/220011a0
PDF (126K)
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| | Short Commons for Canadians 12
Our Special Correspondent
doi:10.1038/220012a0
PDF (129K)
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| | News and Views |  |
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| | Mussels Not for Eating 13
doi:10.1038/220013a0
PDF (119K)
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| | Fisheries Society: Growing and Watching Fish 13
A Correspondent
doi:10.1038/220013b0
PDF (224K)
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| | Fish Distribution: Which Fish Live Where? 14
doi:10.1038/220014a0
PDF (111K)
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| | Crop Breeding: Growing New Hybrids 14
A Correspondent
doi:10.1038/220014b0
PDF (234K)
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| | Infectious Disease: New Look at Scrapie 15
Our Social Medicine Correspondent
doi:10.1038/220015a0
PDF (128K)
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| | Heart Disease: Diets and Death 15
doi:10.1038/220015b0
PDF (254K)
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| | Connective Tissues: Collagen Club 16
A Correspondent
doi:10.1038/220016a0
PDF (131K)
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| | Phage Genetics:  Phage Lysogeny 16
Our Cell Biology Correspondent
doi:10.1038/220016b0
PDF (255K)
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| | Molecular Biology: More Polynucleotide Interactions 17
Our Molecular Biology Correspondent
doi:10.1038/220017a0
PDF (130K)
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| | Protein Chemistry: Homologous Protein Molecules 17
A Correspondent
doi:10.1038/220017b0
PDF (256K)
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| | Neurophysiology: Corollary Discharge? 18
Our Neurophysiology Correspondent
doi:10.1038/220018a0
PDF (132K)
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| | Faraday Society: Homogeneous Catalysis 19
A Correspondent
doi:10.1038/220019a0
PDF (132K)
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| | Polymer Chemistry: Studying Long Polymer Molecules 19
A Correspondent
doi:10.1038/220019b0
PDF (256K)
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| | Antarctic Glaciology: Ice Sheets Laid Bare 20
A Correspondent
doi:10.1038/220020a0
PDF (130K)
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| | Archaeology: Iron Age West Wales 20
Our Archaeology Correspondent
doi:10.1038/220020b0
PDF (130K)
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| | Articles |  |
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| | Dinoflagellate Crop in the North Sea 21
P. C. WOOD
doi:10.1038/220021a0
Abstract & References | PDF (97K)
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| | Dinoflagellate Crop in the North Sea: Distribution of Gonyaulax tamarensis Lebour in the western North Sea in April, May and June 1968 22
G. A. ROBINSON
doi:10.1038/220022a0
References | PDF (233K)
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| | Dinoflagellate Crop in the North Sea: Mortality of Shags and other Sea Birds caused by Paralytic Shellfish Poison 23
J. C. COULSON, G. R. POTTS, I. R. DEANS & S. M. FRASER
doi:10.1038/220023a0
References | PDF (261K)
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| | Dinoflagellate Crop in the North Sea: Biological Observations associated with the Toxic Phytoplankton Bloom off the East Coast 24
J. A. ADAMS, D. D. SEATON, J. B. BUCHANAN & M. R. LONGBOTTOM
doi:10.1038/220024a0
References | PDF (224K)
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| | Dinoflagellate Crop in the North Sea: Distribution of Toxin in Molluscan Shellfish following the Occurrence of Mussel Toxicity in North-East England 25
H. R. INGHAM, JAMES MASON & P. C. WOOD
doi:10.1038/220025a0
References | PDF (296K)
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| | Simultaneous Initiation of Transcription and Translation at Internal Sites in the Tryptophan Operon of E. coli
27
FUMIO IMAMOTO & JUNETSU ITO
doi:10.1038/220027a0
Abstract & References | PDF (572K)
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| | Immediate Cessation of Transcription of the Operator–Proximal Region of the Tryptophan Operon in E. coli after Repression of the Operon 31
FUMIO IMAMOTO
doi:10.1038/220031a0
Abstract & References | PDF (416K)
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| | DNA Uptake by a Mutant Strain of Lymphoma Cells 35
S. R. AYAD & MARGARET FOX
doi:10.1038/220035a0
Abstract & References | PDF (414K)
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| | Is the Troodos Massif of Cyprus a Fragment of Mesozoic Ocean Floor? 39
I. G. GASS
doi:10.1038/220039a0
Abstract & References | PDF (461K)
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| | Letters | |
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| | Dispersion and Pulse Length of the Pulsating Radio Source PSR 1749–28 43
M. I. LARGE & A. E. VAUGHAN
doi:10.1038/220043a0
First paragraph & References | PDF (212K)
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| | Pumping Mechanisms for Maser Action in Galactic OH 44
A. H. COOK
doi:10.1038/220044a0
First paragraph & References | PDF (394K)
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| | Image Tube Observations of the 4430 Interstellar Band 46
M. T. BRÜCK & K. N. NANDY
doi:10.1038/220046a0
First paragraph & References | PDF (312K)
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| | Spatial Variability of the Solar X-ray Spectrum below 20 Å 48
C. R. NEGUS & W. M. GLENCROSS
doi:10.1038/220048a0
First paragraph & References | PDF (374K)
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| | Interpretation of the Diffuse Galactic Light 50
ADOLF N. WITT
doi:10.1038/220050a0
First paragraph & References | PDF (283K)
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| | Solar Events at One Millimetre Wavelength 52
J. E. BECKMAN
doi:10.1038/220052a0
First paragraph & References | PDF (232K)
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| | Mechanism of Transmission of Hydromagnetic Waves through the Earth's Lower Ionosphere 53
C. ALTMAN & E. FIJALKOW
doi:10.1038/220053a0
First paragraph & References | PDF (322K)
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| | Sources of HCl and HF in the Atmosphere of Venus 55
ROBERT F. MUELLER
doi:10.1038/220055a0
First paragraph & References | PDF (449K)
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| | Suppression of Disturbing Light Signals in Rapid Flash Kinetic Measurements 57
H.-E. BUCHWALD & H. RÜPPEL
doi:10.1038/220057a0
First paragraph & References | PDF (222K)
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| | Use of Holography to make Truly Three-dimensional X-ray Images 58
J. D. REDMAN, W. P. WOLTON & E. SHUTTLEWORTH
doi:10.1038/220058a0
First paragraph & References | PDF (306K)
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| | Fracture of Oriented 'Perspex' 60
J. W. CURTIS & L. R. G. TRELOAR
doi:10.1038/220060a0
PDF (212K)
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| | Fracture in Bending, Torsion and Radial Pressure 61
C. GURNEY
doi:10.1038/220061a0
First paragraph & References | PDF (94K)
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| | Growth of Ice Crystals after a Method by Helmholtz 62
CHARLES A. KNIGHT
doi:10.1038/220062a0
First paragraph & References | PDF (290K)
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| | Interstitial Compounds of Potassium with Carbon Fibres 63
C. HÉRINCKX, R. PERRET & W. RULAND
doi:10.1038/220063a0
First paragraph & References | PDF (349K)
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| | Whisker-like Fibres from Chrysotile Asbestos 64
JOHN GOLDEN
doi:10.1038/220064a0
First paragraph & References | PDF (328K)
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| | Conformationally Rigid Analogues of Acetylcholine 65
P. DOUGLAS ARMSTRONG, JOSEPH G. CANNON & JOHN PAUL LONG
doi:10.1038/220065a0
First paragraph & References | PDF (178K)
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| | Self-oxidation of Methylene Blue 66
F. C. SCHAEFER & W. D. ZIMMERMANN
doi:10.1038/220066a0
First paragraph & References | PDF (207K)
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| | Pseudo Polymorphic Transition: the Amphibole Pyroxene Reaction 67
A. G. FREEMAN & F. W. FRAZER
doi:10.1038/220067a0
First paragraph & References | PDF (261K)
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| | Identification of the Terminus of Nascent f2 Bacteriophage RNA 69
HUGH D. ROBERTSON & NORTON D. ZINDER
doi:10.1038/220069a0
First paragraph & References | PDF (131K)
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| | Application of High Resolution Nuclear Magnetic Resonance to Conformational Analyses of Polypeptides in Solution 69
E. M. BRADBURY, B. G. CARPENTER, C. CRANE-ROBINSON & H. W. E. RATTLE
doi:10.1038/220069b0
First paragraph & References | PDF (460K)
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| | Optical Rotatory Dispersion of the Peptide Antibiotic Stendomycin: the Architecture of Microbial Peptides 73
M. BODANSZKY & A. BODANSZKY
doi:10.1038/220073a0
First paragraph & References | PDF (215K)
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| | Functional Interactions between Biogenic Amines, 3',5'-cyclic AMP and Manganese 74
PAUL S. PAPAVASILIOU, SAMUEL T. MILLER & GEORGE C. COTZIAS
doi:10.1038/220074a0
First paragraph & References | PDF (237K)
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| | Age Variations of Acid Deoxyribonuclease Activity in Mouse Liver Nuclei 76
PIERRE LESCA
doi:10.1038/220076a0
First paragraph & References | PDF (243K)
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| | Metabolism of 'Propham' (Isopropyl N-phenylcarbamate) in the Rat 77
G. M. HOLDER & A. J. RYAN
doi:10.1038/220077a0
First paragraph & References | PDF (127K)
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| | Tremorgenic Toxin from Penicillium cyclopium grown on Food Materials 77
BENJAMIN J. WILSON, CHRISTINA H. WILSON & A. WALLACE HAYES
doi:10.1038/220077b0
First paragraph & References | PDF (256K)
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| | Endothelial Mitosis around Aortic Branches in Normal Guinea-pigs 78
H. PAYLING WRIGHT
doi:10.1038/220078a0
First paragraph & References | PDF (252K)
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| | Effect of Adrenergic Blocking Agents on the Calcium Pump of the Fragmented Cardiac Sarcoplasmic Reticulum 79
MICHAEL L. HESS, F. NORMAN BRIGGS, ELLIOT SHINEBOURNE & JOHN HAMER
doi:10.1038/220079a0
First paragraph & References | PDF (201K)
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| | Further Evidence for Seasonal Breeding Cycles in Deep Sea 80
R. Y. GEORGE & R. J. MENZIES
doi:10.1038/220080a0
First paragraph & References | PDF (205K)
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| | Beak Shift: an Explanation for Interocular Mirror-image Reversal in Pigeons 82
I. L. BEALE & M. C. CORBALLIS
doi:10.1038/220082a0
First paragraph & References | PDF (281K)
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| | Inhibition of Growth and Shedding of Antlers by Sex Hormones 83
RICHARD J. GOSS
doi:10.1038/220083a0
First paragraph & References | PDF (484K)
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| | Concentrations of Gibberellin in Chilled Hazel Seeds 85
J. D. ROSS & J. W. BRADBEER
doi:10.1038/220085a0
First paragraph & References | PDF (227K)
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| | Detection of Abscisic Acid in the Xylem Sap of Willow (Salix viminalis L.) by Gas–Liquid Chromatography 86
J. R. LENTON, M. R. BOWEN & P. F. SAUNDERS
doi:10.1038/220086a0
First paragraph & References | PDF (210K)
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| | Radiation-induced Chromosome Exchanges in Campelia zanonia (L.) H.B.K.: Distortion Hypothesis as an Alternative to a Limited Number of Sites 87
JOHN R. K. SAVAGE & D. G. PAPWORTH
doi:10.1038/220087a0
First paragraph & References | PDF (320K)
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| | Identification of Concealed Randomized Objects through Acquired Response Habits of Stimulus and Word Association 89
J. G. PRATT, I. STEVENSON, W. G. ROLL, J. G. BLOM, G. L. MEINSMA, H. H. J. KEIL & N. JACOBSON
doi:10.1038/220089a0
First paragraph & References | PDF (375K)
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| | Identification of Concealed Randomized Objects through Acquired Response Habits of Stimulus and Word Association 91
doi:10.1038/220091a0
PDF (122K)
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| | Investigations of the Inks used in Writing the Dead Sea Scrolls 91
SOLOMON H. STECKOLL
doi:10.1038/220091b0
First paragraph & References | PDF (257K)
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| | Algorithm for the Production of Contour Maps from Scattered Data 92
A. J. COLE
doi:10.1038/220092a0
First paragraph & References | PDF (282K)
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| | Book Reviews |  |
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| | Dancing Bees 95
J. B. FREE reviews The Dance Language and Orientation of Bees
By
Karl von Frisch
doi:10.1038/220095a0
PDF (281K)
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| | Twenty Years of Bee Research 96
EVA CRANE reviews Traité de Biologie de I'Abeille
Edited by
Remy Chauvin
doi:10.1038/220096a0
PDF (142K)
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| | Developmental Biology 96
J. B. GURDON reviews Control Mechanisms in Developmental Processes
Edited by
Michael Locke
doi:10.1038/220096b0
PDF (278K)
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| | Genetics of Farm Animals 97
L. K. O'CONNOR reviews Genetics and Animal Breeding
By
Ivar Johansson & Jan Rendel
doi:10.1038/220097a0
PDF (141K)
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| | Specificity of Antibodies 97
P. G. H. GELL reviews The Structural Basis of Antibody Specificity
By
David Pressman & Allan L. Grossberg
doi:10.1038/220097b0
PDF (276K)
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| | Itches and Infections 98
ANDREW B. SEMPLE reviews Red Mites and Typhus
By
J. R. Audy
doi:10.1038/220098a0
PDF (140K)
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| | Cultivating Parasites 98
W. PETERS reviews The Cultivation of Parasites in vitro
By
Angela E. R. Taylor & J. R. Baker
doi:10.1038/220098b0
PDF (285K)
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| | Personal Construct Theory 99
H. J. EYSENCK reviews The Evaluation of Personal Constructs
By
D. Bannister & J. M. M. Mair
doi:10.1038/220099a0
PDF (150K)
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| | Fibres and Whiskers 100
C. S. WHEWELL reviews Fibre Science and Technology
doi:10.1038/220100a0
PDF (135K)
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| | High Temperature Materials 100
J. W. MARTIN reviews High Temperature Materials
The Controlling Physical Processes. Edited by
A. J. Kennedy
doi:10.1038/220100b0
PDF (135K)
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| | Hyperfine Structure 100
M. A. GRACE reviews Hyperfine Structure and Nuclear Radiations
Edited by
E. Matthias & D. A. Shirley
doi:10.1038/220100c0
PDF (269K)
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| | Radio Communications 101
W. J. G. BEYNON reviews Ionospheric Radio Communications
Edited by
Kristen Folkestad
doi:10.1038/220101a0
PDF (139K)
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| | Obituaries | |
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| | Dr D. W. W. Henderson 101
doi:10.1038/220101b0
PDF (267K)
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| | Professor V. B. Stockmann 102
doi:10.1038/220102a0
PDF (134K)
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| | Errata | |
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| | Erratum 102
doi:10.1038/220102b0
PDF (134K)
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| | Erratum 102
doi:10.1038/220102c0
PDF (134K)
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| | Correspondence | |
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| | Naming the Units 102
A. LODGE
doi:10.1038/220102d0
PDF (134K)
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| | [Correspondence] 103
doi:10.1038/220103a0
PDF (130K)
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| | Forthcoming Events | |
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| | Forthcoming Events 103
doi:10.1038/220103b0
PDF (286K)
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| | Appointments Vacant | |
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| | Appointments Vacant 104
doi:10.1038/220104a0
PDF (161K)
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| | Reports and other Publications | |
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| | Reports and other Publications 104
doi:10.1038/220104b0
PDF (161K)
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