| | Opinion |  |
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| | Less Money to Spend 493
doi:10.1038/217493a0
PDF (236K)
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| | Physicists and Public Issues 494
doi:10.1038/217494a0
PDF (258K)
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| | News | |
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| | Fast Reactors in Europe 495
doi:10.1038/217495a0
PDF (136K)
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| | Money for British Postgraduates 495
doi:10.1038/217495b0
PDF (136K)
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| | Controlling Drugs 496
doi:10.1038/217496a0
PDF (135K)
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| | The Government Inspector 496
doi:10.1038/217496b0
PDF (135K)
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| | Scientists Redundant 496
doi:10.1038/217496c0
PDF (263K)
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| | New Man at Harwell 497
doi:10.1038/217497a0
PDF (131K)
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| | New Man in France 497
doi:10.1038/217497b0
PDF (131K)
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| | Physics Information 497
doi:10.1038/217497c0
PDF (131K)
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| | Doctorates in the United States 497
doi:10.1038/217497d0
PDF (249K)
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| | No Merger for Engineers 498
doi:10.1038/217498a0
PDF (121K)
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| | Safety in Space 498
Angela Croome
doi:10.1038/217498b0
PDF (250K)
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| | Hovercraft Launched 499
doi:10.1038/217499a0
PDF (133K)
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| | School Mathematics 499
doi:10.1038/217499b0
PDF (133K)
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| | Undivided Seconds 499
Our Oxford Correspondent
doi:10.1038/217499c0
PDF (256K)
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| | New Man at Heriot-Watt 500
doi:10.1038/217500a0
PDF (127K)
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| | Commonwealth Universities 500
doi:10.1038/217500b0
PDF (127K)
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| | Oxbridge Admissions 500
doi:10.1038/217500c0
PDF (255K)
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| | Money for Authors 501
doi:10.1038/217501a0
PDF (129K)
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| | New Abstracts 501
doi:10.1038/217501b0
PDF (261K)
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| | Physicists and Politics 502
doi:10.1038/217502a0
PDF (132K)
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| | Wellcome Foundation 502
doi:10.1038/217502b0
PDF (133K)
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| | Cigarette Maker's Puff 503
doi:10.1038/217503a0
PDF (133K)
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| | Measles Vaccine 503
doi:10.1038/217503b0
PDF (133K)
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| | Health in Vietnam 503
Anne Clayton
doi:10.1038/217503c0
PDF (263K)
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| | Parliament in Britain 504
doi:10.1038/217504a0
PDF (134K)
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| | American Science Marks Time 505
doi:10.1038/217505a0
PDF (135K)
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| | News and Views |  |
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| | Cellular Interdependence 506
doi:10.1038/217506a0
PDF (117K)
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| | Geomagnetic Dynamo Energy 506
A Geophysics Correspondent
doi:10.1038/217506b0
PDF (252K)
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| | Thermal Analysis Standards 507
doi:10.1038/217507a0
PDF (136K)
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| | Viruses and Chromosome Breakage 507
Our Cytogenetics Correspondent
doi:10.1038/217507b0
PDF (266K)
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| | Steroids and ATPase 508
Our Medical Biochemistry Correspondent
doi:10.1038/217508a0
PDF (133K)
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| | Ribosomal Proteins 508
Our Cell Biology Correspondent
doi:10.1038/217508b0
PDF (238K)
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| | Articles |  |
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| | How Repressor Molecules Function 509
MARK S. BRETSCHER
doi:10.1038/217509a0
Abstract & References | PDF (365K)
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| | Large-scale Density Inhomogeneities in the Universe 511
M. J. REES & D. W. SCIAMA
doi:10.1038/217511a0
Abstract & References | PDF (723K)
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| | Mongolism, Delayed Fertilization and Human Sexual Behaviour 516
JAMES GERMAN
doi:10.1038/217516a0
Abstract & References | PDF (390K)
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| | Cytogenetical Polymorphism and Evolution in Mammalian Somatic Cell Populations in vivo and in vitro
518
D. T. HUGHES
doi:10.1038/217518a0
Abstract & References | PDF (815K)
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| | Histochemical and Biochemical Study of Synaptic Lysosomes 523
MILDRED K. GORDON, KLAUS G. BENCH, GRACE G. DEANIN & MALCOLM W. GORDON
doi:10.1038/217523a0
Abstract & References | PDF (693K)
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| | Adjuvanticity of Vitamin A 527
D. W. DRESSER
doi:10.1038/217527a0
Abstract & References | PDF (338K)
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| | Kinetics of Myofilament Activation in Potentiated Contraction: Staircase Phenomenon in Human Skeletal Muscle 529
JOHN E. DESMEDT & KARL HAINAUT
doi:10.1038/217529a0
Abstract & References | PDF (494K)
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| | Letters | |
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| | Eliminating False Alarms when detecting Seismic Events Automatically 533
K. J. MUIRHEAD
doi:10.1038/217533a0
First paragraph & References | PDF (153K)
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| | Palaeomagnetism of a Stratiform Intrusion in the Pensacola Mountains, Antarctica 534
MYRL E. BECK JUN., ARTHUR B. FORD & WALTER W. BOYD JUN.
doi:10.1038/217534a0
First paragraph & References | PDF (191K)
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| | Genesis of Concordant Deposits of Base Metal Sulphides: an Experimental Approach 535
B. W. ROBINSON & R. G. J. STRENS
doi:10.1038/217535a0
First paragraph & References | PDF (226K)
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| | Existence of a Surface Tension Discontinuity at a Liquid Free Surface 536
R. H. J. SELLIN
doi:10.1038/217536a0
First paragraph & References | PDF (378K)
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| | Wavelengths and Relative A-Coefficients for the Forbidden Lines of Atomic Sulphur 538
J. W. McCONKEY, D. J. BURNS, K. A. MORAN & J. A. KERNAHAN
doi:10.1038/217538a0
First paragraph & References | PDF (270K)
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| | Crystal Structure of Ethylenebidiguanide Silver (III) Nitrate 539
N. R. KUNCHUR
doi:10.1038/217539a0
First paragraph & References | PDF (311K)
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| | Crystal Structure and the Lower Phase Transition in Solid Deuterium Bromide 541
E. SÁNDOR & M. W. JOHNSON
doi:10.1038/217541a0
First paragraph & References | PDF (336K)
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| | Activation of Small Molecules by Transition Metal Ions and their Complexes 543
R. MASON
doi:10.1038/217543a0
First paragraph & References | PDF (355K)
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| | Transport of Ions against their Concentration Gradients in an Analogue System for Active Transport using Charged Membranes 545
RUSSELL PATERSON
doi:10.1038/217545a0
First paragraph & References | PDF (337K)
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| | Detection and Location of N-Methyl-amino-acid Residues in N-Acyloligopeptide Methyl Esters by Mass Spectrometry 547
B. C. DAS, S. D. GÉRO & E. LEDERER
doi:10.1038/217547a0
First paragraph & References | PDF (167K)
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| | Mechanism of Bonding in Aqueous Nickelous Nitrate–Magnesium Oxide Cements 548
E. L. WILLIAMS & H. H. WILSON
doi:10.1038/217548a0
First paragraph & References | PDF (252K)
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| | Possible Formation of an Azulene-type Radical obtained on Heating 3,4-Benzpyrene 550
W. F. FORBES & J. C. ROBINSON
doi:10.1038/217550a0
First paragraph & References | PDF (188K)
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| | Urinary Hydroxyproline Excretion in Phosphate Depleted Rachitic Rats 551
VICTOR PARSONS & MALCOLM SELF
doi:10.1038/217551a0
First paragraph & References | PDF (211K)
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| | Effect of Phenylhydrazine and Hydrolysed Glucose Cycloacetoacetate on Adenosinetriphosphatase Activity in Liver Mitochondria 552
M. C. NATH, T. G. REDDI & N. NATH
doi:10.1038/217552a0
First paragraph & References | PDF (253K)
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| | Conversion of  -Amino Laevulinic Acid to Porphobilinogen by Different Tissues of the Polychaete Annelid Neoamphitrite figulus
553
R. PHILLIPS DALES
doi:10.1038/217553a0
First paragraph & References | PDF (132K)
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| | Measurement and Significance of Weight Heterogeneity in Some Protein and Polysaccharide Preparations 553
J. WATKINS & D. E. H. TEE
doi:10.1038/217553b0
First paragraph & References | PDF (498K)
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| | Photosynthetic Bacterium growing under Carbon Monoxide 555
PETER HIRSCH
doi:10.1038/217555a0
First paragraph & References | PDF (373K)
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| | Competitive Binding of Streptomycin and Magnesium with Escherichia coli Ribosomes 556
YONG SUNG CHOI & CHARLES W. CARR
doi:10.1038/217556a0
First paragraph & References | PDF (248K)
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| | Erasure of Immunological Memory with Anti-lymphocyte Serum 557
EUGENE LANCE
doi:10.1038/217557a0
First paragraph & References | PDF (235K)
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| | Stem-cell Inactivation in Mixed Spleen Cell Cultures 558
R. V. PETROV, L. S. SESLAVINA & E. I. PANTELEJEV
doi:10.1038/217558a0
First paragraph & References | PDF (330K)
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| | Use of Horse Anti-pig Leucocyte Serum to suppress the Homograft Reaction in Pigs 560
J. N. LUCKE, E. J. IMMELMAN, M. O. SYMES & A. C. HUNT
doi:10.1038/217560a0
First paragraph & References | PDF (123K)
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| | Cross-reaction of Anti-lymphocyte Serum with Haemopoietic Stem Cells 561
E. O. FIELD & J. E. GIBBS
doi:10.1038/217561a0
First paragraph & References | PDF (277K)
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| | Inhibitory Effect of 1,2-bis(2-Benzim-idazolyl) 1,2-ethanediol Derivatives on Poliovirus 562
SUMIYUKI AKIHAMA, MASAYOSHI OKUDE, KATSUO SATO & SHIZUE IWABUCHI
doi:10.1038/217562a0
First paragraph & References | PDF (218K)
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| | Response of an Active Component of Croton Oil to Short-term Tests of Carcinogenicity 563
CONRAD LIBERMANN, PHILIPPE LAZAR, IVAN CHOUROULINKOV & MAURICE GUÉRIN
doi:10.1038/217563a0
First paragraph & References | PDF (209K)
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| | Infectious Mononucleosis: Continuous Suspension Culture of Peripheral Blood Leucocytes 564
PHILIP R. GLADE, JULIUS A. KASEL, HAROLD L. MOSES, JACQUELINE WHANG-PENG, PETER F. HOFFMAN, JOHN K. KAMMERMEYER & LAWRENCE N. CHESSIN
doi:10.1038/217564a0
First paragraph & References | PDF (255K)
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| | Seizures in Experimental Porphyria 565
NECHAMA S. KOSOWER & RICA A. ROCK
doi:10.1038/217565a0
First paragraph & References | PDF (442K)
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| | Heterochromatic Segments in Vicia revealed by Treatment with HCI–Acetic Acid 567
SHIN TAKEHISA
doi:10.1038/217567a0
First paragraph & References | PDF (397K)
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| | Chromosome Aberrations during Normal Epithelial Proliferation 568
J.-G. FORSBERG & B. LANNERSTAD
doi:10.1038/217568a0
First paragraph & References | PDF (305K)
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| | Production of Foetal Haemoglobin in Marrow Cultures of Human Adults 569
JUDITH GOSLIN HALL & ARNO G. MOTULSKY
doi:10.1038/217569a0
First paragraph & References | PDF (346K)
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| | Powerful New Aggregator of Blood Platelets—2-Chloroadenosine-5'-diphosphate 571
M. HELEN MAGUIRE & FRANK MICHAL
doi:10.1038/217571a0
First paragraph & References | PDF (317K)
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| | Sites of Action of some Partial Agonists on the Isolated Guinea-pig Ileum 573
K. TAKAGI, I. TAKAYANAGI, F. TAGA & K. NISHINO
doi:10.1038/217573a0
First paragraph & References | PDF (229K)
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| | Daily Rhythm in the Noradrenaline Content of Rat Hypothalamus 574
JAMES MANSHARDT & RICHARD J. WURTMAN
doi:10.1038/217574a0
First paragraph & References | PDF (254K)
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| | Thermoregulation in Tortoises 575
J. L. CLOUDSLEY-THOMPSON
doi:10.1038/217575a0
First paragraph & References | PDF (123K)
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| | Application of Laser Interferometry to Physiological Studies of Excitable Tissues 575
R. SANDLIN, L. LERMAN, W. BARRY & I. TASAKI
doi:10.1038/217575b0
First paragraph & References | PDF (291K)
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| | Composition of Trabecular Bone in Children and its relation to Radiation Dosimetry 576
E. D. DYSON & W. J. WHITEHOUSE
doi:10.1038/217576a0
First paragraph & References | PDF (410K)
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| | Regulation of Albumin Synthesis and Catabolism by Alteration of Dietary Protein 578
R. KIRSCH, LESLEY FRITH, ELIZABETH BLACK & R. HOFFENBERG
doi:10.1038/217578a0
First paragraph & References | PDF (219K)
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| | Association between Pandalus borealis and Fine-grained Sediments off Northumberland 579
P. J. WARREN & R. W. SHELDON
doi:10.1038/217579a0
First paragraph & References | PDF (192K)
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| | Red Light Induction of Gibberellin Synthesis in Leaves 580
D. M. REID, J. B. CLEMENTS & D. J. CARR
doi:10.1038/217580a0
First paragraph & References | PDF (300K)
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| | Estimation of the Distribution of Plant Roots in Soil 582
R. SCOTT RUSSELL & F. B. ELLIS
doi:10.1038/217582a0
First paragraph & References | PDF (268K)
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| | Difference in Flight Capacity between Naturally Occurring Spring and Summer Forms of Myzus persicae (Sulz.) (Hemiptera:Aphididae) 583
J. A. T. WOODFORD
doi:10.1038/217583a0
First paragraph & References | PDF (229K)
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| | Holographic Model of Temporal Recall 584
D. GABOR
doi:10.1038/217584a0
First paragraph & References | PDF (98K)
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| | Book Reviews |  |
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| | Top Biologists 585
J. Z. YOUNG reviews Nobel Lectures
doi:10.1038/217585a0
PDF (133K)
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| | Brain–Hormone Interactions 585
K. BROWN-GRANT reviews Neuroendocrinology
Vol. 2. Edited by
Lucian Martini & William F. Ganong
doi:10.1038/217585b0
PDF (267K)
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| | From Mind to Mind 586
JOHN COHEN reviews The Psychology of Human Communication
By
John Parry
doi:10.1038/217586a0
PDF (137K)
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| | Layman's Academic Psychology 586
K. T. STRONGMAN reviews Psychology and Social Problems
By
Michael Argyle
doi:10.1038/217586b0
PDF (275K)
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| | Data to Theory in Social Science 587
C. MADGE reviews Theory and Methods of Social Research
By
Johan Galtung
doi:10.1038/217587a0
PDF (139K)
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| | Physical Chemistry of Pigments 587
I. D. RATTEE reviews Pigments
AN Introduction to their Physical Chemistry. Edited by
David Patterson
doi:10.1038/217587b0
PDF (271K)
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| | Reference to Plutonium 588
P. G. MARDON reviews Plutonium Handbook
A Guide to the Technology. Vol. 1. Edited by
O. J. Wick
doi:10.1038/217588a0
PDF (133K)
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| | Twenty Years On 588
C. A. ROSS reviews Dynamic Aspects of Biochemistry
By
Ernest Baldwin
doi:10.1038/217588b0
PDF (133K)
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| | IUWDS International Geophysical Calendar for 1968 | |
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| | IUWDS International Geophysical Calendar for 1968 589
doi:10.1038/217589a0
PDF (42K)
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| | IUWDS International Geophysical Calendar for 1968 590
doi:10.1038/217590a0
PDF (108K)
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| | Errata | |
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| | Erratum 590
doi:10.1038/217590b0
PDF (108K)
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| | Erratum 590
doi:10.1038/217590c0
PDF (108K)
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| | Erratum 590
doi:10.1038/217590d0
PDF (108K)
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| | Erratum 590
doi:10.1038/217590e0
PDF (108K)
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| | Erratum 590
doi:10.1038/217590f0
PDF (108K)
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|
| | Corrigenda | |
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| | Corrigendum 590
doi:10.1038/217590g0
PDF (108K)
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| | Corrigendum 590
doi:10.1038/217590h0
PDF (108K)
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| | Forthcoming Events | |
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| | Forthcoming Events 591
doi:10.1038/217591a0
PDF (158K)
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| | Appointments Vacant | |
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| | Appointments Vacant 591
doi:10.1038/217591b0
PDF (292K)
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| | Reports and other Publications | |
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| | Reports and other Publications 592
doi:10.1038/217592a0
PDF (135K)
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