| | Opinion |  |
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| | Communications in the Dark 537
doi:10.1038/227537a0
PDF (233K)
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| | Education the Other Side of the Tracks 538
doi:10.1038/227538a0
PDF (239K)
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| | Under the Shadow of the Axe 539
doi:10.1038/227539a0
PDF (247K)
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| | 100 Years Ago 540
doi:10.1038/227540a0
PDF (131K)
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| | Old World | |
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| | Foulness: Airports and Seaports 540
doi:10.1038/227540b0
PDF (278K)
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| | Copernicus: Five Hundred Years After 541
Our Soviet Correspondent
doi:10.1038/227541a0
PDF (152K)
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| | Computers: ICL Looks East Again 541
doi:10.1038/227541b0
PDF (152K)
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| | Museums: Mammals on Show 542
doi:10.1038/227542a0
PDF (144K)
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| | Romania: After the Flood 542
doi:10.1038/227542b0
PDF (144K)
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| | Soviet Union: Farming in the Clouds 542
Our Soviet Correspondent
doi:10.1038/227542c0
PDF (144K)
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| | Roza Kuleshova Found Peeping 543
Our Soviet Correspondent
doi:10.1038/227543a0
PDF (110K)
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| | Similarities and Disparities in Europe 544
doi:10.1038/227544a0
PDF (125K)
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| | New World | |
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| | Dr McElroy claims his Crown 545
doi:10.1038/227545a0
PDF (244K)
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| | The House that Smithson Built 546
doi:10.1038/227546a0
PDF (268K)
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| | NASA: Paine returns to General Electric 547
doi:10.1038/227547a0
PDF (139K)
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| | Psychology: How to spot Hijackers 548
doi:10.1038/227548a0
PDF (137K)
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| | Consumerism: Voids in Cereals and Teeth 548
doi:10.1038/227548b0
PDF (403K)
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| | CATV: Cable Television on Manhattan 549
Our New York Correspondent
doi:10.1038/227549a0
PDF (410K)
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| | Miscellaneous Intelligence 550
doi:10.1038/227550a0
PDF (142K)
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| | News and Views |  |
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| | Can Hurricanes be Controlled ? 551
doi:10.1038/227551a0
PDF (102K)
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| | Dipoles: How the Earth's Field Reverses 552
Our Geomagnetism Correspondent
doi:10.1038/227552a0
PDF (131K)
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| | Chemical Reactions: Mechanisms in Solution 552
A Correspondent
doi:10.1038/227552b0
PDF (256K)
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| | Non-Aqueous Solvents: Strong and Unusual Interactions 553
A Correspondent
doi:10.1038/227553a0
PDF (130K)
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| | The Earth: Sulphur in the Core ? 553
Our Geomagnetism Correspondent
doi:10.1038/227553b0
PDF (264K)
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| | Enzymes: Sophisticated Nucleases 554
Our Molecular Biology Correspondent
doi:10.1038/227554a0
PDF (139K)
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| | Diatoms: Close-up of Valves 555
doi:10.1038/227555a0
PDF (155K)
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| | Plant Breeding: Cells hold Promise 555
Our Botany Correspondent
doi:10.1038/227555b0
PDF (156K)
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| | Deer: Layman's Guide 556
doi:10.1038/227556a0
PDF (263K)
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| | Food: Modern Methods Wanted 556
Our Botany Correspondent
doi:10.1038/227556b0
PDF (260K)
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| | Articles |  |
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| | Breeding Cattle for the Tropics 557
JOHN FRANCIS
doi:10.1038/227557a0
Abstract & References | PDF (580K)
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| | Central Dogma of Molecular Biology 561
FRANCIS CRICK
doi:10.1038/227561a0
Abstract & References | PDF (302K)
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| | Characterization of the Products of RNA-directed DNA Polymerases in Oncogenic RNA Viruses 563
S. SPIEGELMAN, A. BURNY, M. R. DAS, J. KEYDAR, J. SCHLOM, M. TRAVNICEK & K. WATSON
doi:10.1038/227563a0
Abstract & References | PDF (512K)
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| | Translation of Phage Q mRNA: A Test of the Two-site Model for Ribosomal Function 567
DONALD J. ROUFA, LAWRENCE E. SKOGERSON & PHILIP LEDER
doi:10.1038/227567a0
Abstract & References | PDF (485K)
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| | Untranslated Nucleotide Sequence at the 5'-End of R 17 Bacteriophage RNA 570
JERRY M. ADAMS & SUZANNE CORY
doi:10.1038/227570a0
Abstract & References | PDF (545K)
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| | Proton Magnetic Resonance, Magnetic Susceptibility and Mössbauer Studies of Clostridium pasteurianum Rubredoxin 574
W. D. PHILLIPS, M. POE, J. F. WEIHER, C. C. McDONALD & W. LOVENBERG
doi:10.1038/227574a0
Abstract & References | PDF (456K)
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| | Was Virchow Right about Neandertal ? 577
FRANCIS IVANHOE
doi:10.1038/227577a0
Abstract & References | PDF (380K)
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| | Expansion Motions in the Inner Parts of the Galaxy 579
T. K. MENON & J. E. CIOTTI
doi:10.1038/227579a0
Abstract & References | PDF (294K)
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| | Letters | |
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| | Opaque Radio Sources near the Galactic Equator 582
D. G. MACDONELL & A. H. BRIDLE
doi:10.1038/227582a0
First paragraph & References | PDF (207K)
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| | Ruderman's Theory of Vortex−Lattice Vibrations in Pulsars 584
A. L. FETTER & D. STAUFFER
doi:10.1038/227584a0
First paragraph & References | PDF (211K)
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| | Quasar Absorption Lines and Radio Polarization 585
F. F. GARDNER & J. B. WHITEOAK
doi:10.1038/227585a0
First paragraph & References | PDF (97K)
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| | Circular Polarization of Quasars at  49 Cm 585
J. A. GILBERT & R. G. CONWAY
doi:10.1038/227585b0
First paragraph & References | PDF (200K)
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| | Infrared Background from Seyfert Galaxies 586
G. SETTI & L. WOLTJER
doi:10.1038/227586a0
First paragraph & References | PDF (223K)
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| | Small Dust Grains and the Heating of HI Clouds 587
N. C. WICKRAMASINGHE
doi:10.1038/227587a0
First paragraph & References | PDF (228K)
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| | Motion of the Interplanetary Dust Cloud 588
J. F. JAMES & M. J. SMEETHE
doi:10.1038/227588a0
First paragraph & References | PDF (224K)
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| | Energy and Radial Dependence of Air Shower Radio Pulses 590
J. H. HOUGH & J. R. PRESCOTT
doi:10.1038/227590a0
First paragraph & References | PDF (223K)
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| | Search for Jovian Hectometric Continuum Radiation 591
RICHARD R. WEBER & ROBERT G. STONE
doi:10.1038/227591a0
First paragraph & References | PDF (105K)
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| | The Gediz (Turkey) Earthquake of March 28, 1970 592
N. N. AMBRASEYS & J. S. TCHALENKO
doi:10.1038/227592a0
First paragraph & References | PDF (340K)
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| | Minor Metal Contents of Recent Organic-rich Sediments off South West Africa 593
S. E. CALVERT & N. B. PRICE
doi:10.1038/227593a0
First paragraph & References | PDF (423K)
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| | K−Ar Age of the Deccan Traps, India 595
P. WELLMAN & M. W. MCELHINNY
doi:10.1038/227595a0
First paragraph & References | PDF (281K)
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| | Alluvial History of Central Mexico 596
C. VITA-FINZI
doi:10.1038/227596a0
First paragraph & References | PDF (287K)
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| | Geological Age of Gaudryina tailleuri in Northern Alaska 598
W. V. RAMSAY
doi:10.1038/227598a0
First paragraph & References | PDF (144K)
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| | Molecular Model of Drag Reduction by Polymer Solutes 598
A. PETERLIN
doi:10.1038/227598b0
First paragraph & References | PDF (270K)
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| | Mechanism for Turbulent Drag Reduction in Dilute Polymer Solutions 599
R. J. GORDON
doi:10.1038/227599a0
First paragraph & References | PDF (282K)
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| | The Hygrocyst−a Stability Phenomenon in Continuum Mechanics 600
ROBERT THEODORE BALMER
doi:10.1038/227600a0
First paragraph & References | PDF (282K)
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| | Vibrational Relaxation of HBr( " = 1) by HCl at 300 K 602
R. J. DONOVAN, D. HUSAIN & C. D. STEVENSON
doi:10.1038/227602a0
First paragraph & References | PDF (323K)
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| | Chain Initiation by Reovirus RNA Transcriptase in vitro
603
DANIEL H. LEVIN, GEORGE ACS & SAMUEL C. SILVEBSTEIN
doi:10.1038/227603a0
First paragraph & References | PDF (440K)
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| | Protein-deficient Ribosomes in Chloramphenicol-treated Escherichia coli
604
ROBERT M. YOUNG & D. NAKADA
doi:10.1038/227604a0
First paragraph & References | PDF (350K)
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| | Segregation of Transferable R Factors into Escherichia coli Minicells 606
STUART B. LEVY & PAULA NORMAN
doi:10.1038/227606a0
First paragraph & References | PDF (265K)
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| | Natural Release of Nucleic Acids from Bacteria into Plant Cells 607
M. STROUN, P. ANKER & G. AUDERSET
doi:10.1038/227607a0
First paragraph & References | PDF (334K)
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| | Dissociation of -Galactosidase by Thiols 608
SIDNEY SHIFRIN, BARBARA J. GROCHOWSKI & SAMUEL W. LUBORSKY
doi:10.1038/227608a0
First paragraph & References | PDF (324K)
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| | Tay-Sachs Disease is Probably not Increasing 609
NTINOS C. MYRIANTHOPOULOS, ALFRED F. NAYLOR & STANLEY M. ARONSON
doi:10.1038/227609a0
First paragraph & References | PDF (121K)
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| | Brain Damage in Infant Mice following Oral Intake of Glutamate, Aspartate or Cysteine 609
JOHN W. OLNEY & OI-LAN HO
doi:10.1038/227609b0
First paragraph & References | PDF (459K)
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| | Monosodium Glutamate and the Chinese Restaurant Syndrome 611
P. L. MORSELLI & S. GARATTINI
doi:10.1038/227611a0
First paragraph & References | PDF (244K)
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| | Progressive Neuromuscular and Skeletal Disorders in a Male with an Acrocentric Supernumerary Chromosome 612
WOLFGANG LEHRNBECHER, GEORGE J. LUCAS, DANTE PICCIANO & CECIL B. JACOBSON
doi:10.1038/227612a0
First paragraph & References | PDF (259K)
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| | Evidence that the Xg Locus is Inactivated in Structurally Abnormal X Chromosomes 613
P. E. POLANI, ROSLYN ANGELL, F. GIANNELLI, A. DE LA CHAPELLE, R. R. RACE & RUTH SANGER
doi:10.1038/227613a0
First paragraph & References | PDF (488K)
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| | Essential Role of Testosterone in the Sexual Stimulation induced by p-Chlorophenylalanine in Male Animals 616
GIAN L. GESSA, ALESSANDRO TAGLIAMONTE, PAOLA TAGLIAMONTE & BERNARD B. BRODIE
doi:10.1038/227616a0
First paragraph & References | PDF (272K)
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| | Cell Division during Regeneration in Hydra
617
HELEN D. PARK, ANNE B. ORTMEYER & DWIGHT P. BLANKENBAKER
doi:10.1038/227617a0
First paragraph & References | PDF (399K)
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| | Adrenal Gland in Tissue Culture 619
L. MANUELIDIS
doi:10.1038/227619a0
First paragraph & References | PDF (461K)
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| | Human Digits in Organ Culture 621
K. T. RAJAN & A. M. HOPKINS
doi:10.1038/227621a0
First paragraph & References | PDF (306K)
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| | Pre-mating and Pregnancy Stress in Rats affects Behaviour of Grandpups 622
FRANCINE WEHMER, RICHARD H. PORTER & BEVERLY SCALES
doi:10.1038/227622a0
First paragraph & References | PDF (145K)
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| | Modes of Transmission of Whirling Disease of Trout 622
T. U. MEYERS, J. SCALA & EVELYN SIMMONS
doi:10.1038/227622b0
First paragraph & References | PDF (318K)
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| | Identification of Tufted Cells in the Olfactory Bulb 623
R. A. NICOLL
doi:10.1038/227623a0
First paragraph & References | PDF (376K)
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| | Tympanic Membrane Response in the Cricket 625
B. M. JOHNSTONE, J. C. SAUNDERS & J. R. JOHNSTONE
doi:10.1038/227625a0
First paragraph & References | PDF (461K)
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| | Do Pigeons determine Latitudinal Displacement from the Sun's Altitude? 626
WILLIAM T. KEETON
doi:10.1038/227626a0
First paragraph & References | PDF (469K)
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| | Do Pigeons determine Latitudinal Displacement from the Sun's Altitude? (Reply) 627
G. V. T. MATTHEWS
doi:10.1038/227627a0
References | PDF (128K)
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|
| | Photoperiod and Flower Bud Development in Phaseolus vulgaris
628
M. S. ZEHNI, F. S. SAAD & D. G. MORGAN
doi:10.1038/227628a0
First paragraph & References | PDF (230K)
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|
| | Fossil of an American Sedge, Dulichium arundinaceum (L.) Britt., in Britain 629
FRANCES G. BELL
doi:10.1038/227629a0
First paragraph & References | PDF (267K)
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| | Eutherian Mammal from the Early Campanian (Late Cretaceous) of Alberta, Canada 630
RICHARD C. FOX
doi:10.1038/227630a0
First paragraph & References | PDF (243K)
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| | Bradford's Law of Bibliography of Science: an Interpretation 631
S. NARANAN
doi:10.1038/227631a0
First paragraph & References | PDF (188K)
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| | Book Reviews |  |
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| | Metamethodology 633
J. E. MCGUIRE reviews The Methodological Heritage of Newton
Edited by
Robert F. Butts & John W. Davis
doi:10.1038/227633a0
PDF (135K)
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|
| | Inspired Mathematician 633
T. A. A. BROADBENT reviews Hilbert
By Constance Reid. With an Appreciation of Hilbert's Mathematical Work by
Hermann Weyl
doi:10.1038/227633b0
PDF (135K)
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|
| | Simple Superconductivity 634
D. R. TILLEY reviews Superconductivity
By
A. W. B. Taylor
doi:10.1038/227634a0
PDF (132K)
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| | Hot Plasmas 634
D. A. DUNNETT reviews The Physics of Hot Plasmas
Edited by
B. J. Rye & J. C. Taylor
doi:10.1038/227634b0
PDF (132K)
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|
| | Organic Geochemistry 634
N. B. PRICE reviews Organic Geochemistry
Methods and Results. Edited by
G. Eglinton & M. T. J. Murphy
doi:10.1038/227634c0
PDF (132K)
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|
| | Flow Engineering 635
M. J. HALL reviews Theory of Groundwater Flow
By
A. Verruijt
doi:10.1038/227635a0
PDF (141K)
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|
| | What's it all about, Alfie? 635
I. KUCZYNSKI reviews Human Engineering
By
Lord Robens
doi:10.1038/227635b0
PDF (141K)
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| | Power Struggles in Germany 635
R. W. CAHN reviews Das Gesellschaftsbild des Ingenieurs
Zum Politischen Verhalten der Technischen Intelligenz in Deutschland. By
Gerd Hortleder
doi:10.1038/227635c0
PDF (274K)
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|
| | Borstal Boys 636
D. J. WEST reviews City Lads in Borstal
A Study based on 100 Lads discharged to Addresses in Liverpool. By
David Murray Lowson
doi:10.1038/227636a0
PDF (138K)
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|
| | Agents of Disease 636
FRIEDRICH DEINHARDT reviews Virus Diseases of the Liver
By
A. J. Zuckerman
doi:10.1038/227636b0
PDF (138K)
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| | Proteolytic Enzymes 636
DAVID SHOTTON reviews Structure-Function Relationships of Proteolytic Enzymes
Edited by
P. Desnuelle, H. Neurath & M. Ottesen
doi:10.1038/227636c0
PDF (272K)
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|
| | Classification of Communication 637
J. D. CARTHY reviews Approaches to Animal Communication
Edited by
T. A. Sebeok & A. Ramsay
doi:10.1038/227637a0
PDF (139K)
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|
| | Animal Distribution 637
WILMA GEORGE reviews Dynamic Zoogeography with Special Reference to Land Animals
By
Miklos D. F. Udvardy
doi:10.1038/227637b0
PDF (273K)
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|
| | Minority View of Systematics 638
MICHAEL T. GHISELIN reviews Classification and Biology
By
R. A. Crowson
doi:10.1038/227638a0
PDF (138K)
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|
| | Placental Morphology 638
GEOFFREY DIXON reviews The Human Placenta
By
J. D. Boyd & W. J. Hamilton
doi:10.1038/227638b0
PDF (138K)
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|
| | Personal Neurology 638
R. A. HENSON reviews Brain Diseases
By
A. Biemond
doi:10.1038/227638c0
PDF (278K)
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|
| | Grain Improvement 639
L. A. WILLEY reviews Sorghum
By
H. Doggett
doi:10.1038/227639a0
PDF (144K)
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|
| | Turkish Delights 639
R. D. MEIKLE reviews Flora of Turkey and the East Aegean Islands
Edited by
P. H. Davis
doi:10.1038/227639b0
PDF (278K)
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|
| | Atomic Collisions 640
A. R. HOLT reviews Introduction to the Theory of Ion−Atom Collisions
By
M. R. C. McDowell & J. P. Coleman
doi:10.1038/227640a0
PDF (138K)
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|
| | Short Notices 640
doi:10.1038/227640b0
PDF (138K)
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|
| | Correspondence | |
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| | Disputed Interpretation of a Pronoun 641
D. M. ROESSLER
doi:10.1038/227641a0
References | PDF (118K)
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| | Disputed Interpretation of a Pronoun (Reply) 641
JAMES M. LITTLE
doi:10.1038/227641b0
References | PDF (118K)
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| | Disputed Interpretation of a Pronoun (Reply) 641
EDWARD GURR
doi:10.1038/227641c0
PDF (118K)
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|
| | Scientific Heresy 641
J. R. G. TURNER
doi:10.1038/227641d0
PDF (118K)
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| | Niagara Falls 642
THOMAS R. MAGORIAN
doi:10.1038/227642a0
PDF (103K)
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|
| | Bode's Law 642
JOHN A. ANTAL
doi:10.1038/227642b0
PDF (103K)
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|
| | Obituary | |
|
| | Professor W. R. Jones 642
doi:10.1038/227642c0
PDF (103K)
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|
| | Announcements | |
|
| | Announcements 642
doi:10.1038/227642d0
PDF (216K)
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|
| | Errata | |
|
| | Erratum 643
doi:10.1038/227643a0
PDF (116K)
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|
| | Erratum 643
doi:10.1038/227643b0
PDF (118K)
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|
| | Reports and Publications | |
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| | Reports and Publications 644
doi:10.1038/227644a0
PDF (168K)
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