| | Opinion |  |
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| | How to Alarm People and Lose Friends 1141
doi:10.1038/2241141a0
PDF (230K)
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| | Bringing Down the Tablets 1142
doi:10.1038/2241142a0
PDF (261K)
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| | 100 Years Ago 1143
doi:10.1038/2241143a0
PDF (143K)
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| | News | |
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| | Science Teaching: Scraping the Bottom 1143
Our Education Correspondent
doi:10.1038/2241143b0
PDF (276K)
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| | Photochemistry: More Money for Bright Future 1144
doi:10.1038/2241144a0
PDF (133K)
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| | Road Traffic: Towards Saturation 1144
doi:10.1038/2241144b0
PDF (568K)
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| | Postgraduate Training: Royal Charter for Cranfield 1145
Our Education Correspondent
doi:10.1038/2241145a0
PDF (560K)
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| | Horticulture: Banishing the Viruses 1146
Our Botany Correspondent
doi:10.1038/2241146a0
PDF (122K)
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| | Physics: Europhysics Journals 1146
doi:10.1038/2241146b0
PDF (122K)
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| | Soviet Research: Diamond Threads 1146
Our Soviet Correspondent
doi:10.1038/2241146c0
PDF (516K)
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| | Health Economics: Cost of Disease 1147
doi:10.1038/2241147a0
PDF (184K)
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| | Image Tubes: Bigger Market Sought 1147
Our Astronomy Correspondent
doi:10.1038/2241147b0
PDF (183K)
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| | Lenin Days: Science in Estonia 1147
doi:10.1038/2241147c0
PDF (587K)
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| | Nature Reserves: More Countryside Protected 1148
doi:10.1038/2241148a0
PDF (194K)
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| | Hospitals: Survival of the Unfit 1148
doi:10.1038/2241148b0
PDF (194K)
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| | Parliament in Britain 1149
doi:10.1038/2241149a0
PDF (134K)
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| | Miscellaneous Intelligence 1149
doi:10.1038/2241149b0
PDF (134K)
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| | Sociology of Postdoctoral Students 1150
doi:10.1038/2241150a0
PDF (132K)
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| | News and Views |  |
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| | What Makes DNA Duplicate? 1151
doi:10.1038/2241151a0
PDF (239K)
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| | Surveying: Arctic Ocean Oil 1152
Our Geomagnetism Correspondent
doi:10.1038/2241152a0
PDF (118K)
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| | Stars: Observing Made Easy 1152
Our Astronomy Correspondent
doi:10.1038/2241152b0
PDF (245K)
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| | Mid-Oceanic Ridges: Ocean Floor on Land 1153
Our Geomagnetism Correspondent
doi:10.1038/2241153a0
PDF (127K)
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| | Quasars: Like the Sun 1153
Our Cosmology Correspondent
doi:10.1038/2241153b0
PDF (127K)
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| | Chromosomes: Cytological Clarity 1153
doi:10.1038/2241153c0
PDF (362K)
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| | Liquid Structures: Particle Correlations Recalculated 1154
doi:10.1038/2241154a0
PDF (235K)
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| | Transplants: Elusive Antibodies 1154
A Correspondent
doi:10.1038/2241154b0
PDF (364K)
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| | Biochemical Disease: Treatment by Vitamins 1155
Our Medical Biochemistry Correspondent
doi:10.1038/2241155a0
PDF (129K)
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| | Proteins: Conservation and Divergence 1155
Our Molecular Biology Correspondent
doi:10.1038/2241155b0
PDF (263K)
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| | Plant Cells: Orchard in a Test Tube 1156
Our Botany Correspondent
doi:10.1038/2241156a0
PDF (268K)
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| | Geotropism: Statolith Hypothesis Upheld 1157
Our Plant Physiology Correspondent
doi:10.1038/2241157a0
PDF (134K)
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| | Entomology: Flying Parasites 1157
A Correspondent
doi:10.1038/2241157b0
PDF (134K)
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| | Articles |  |
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| | Infall of Gas from Intergalactic Space 1158
J. H. OORT
doi:10.1038/2241158a0
Abstract & References | PDF (614K)
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| | Isolation of an E. coli Strain with a Mutation affecting DNA Polymerase 1164
PAULA DE LUCIA & JOHN CAIRNS
doi:10.1038/2241164a0
Abstract & References | PDF (331K)
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| | Genetic Analysis of an E. coli Strain with a Mutation affecting DNA Polymerase 1166
JULIAN GROSS & MARILYN GROSS
doi:10.1038/2241166a0
Abstract & References | PDF (319K)
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| | Termination Factor for RNA Synthesis 1168
JEFFREY W. ROBERTS
doi:10.1038/2241168a0
Abstract & References | PDF (847K)
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| | Effect of  -Adrenergic Blockade and Alcohol on Simulated Car Driving 1175
V. GOLDMAN, B. COMERFORD, D. HUGHES & G. NYBERG
doi:10.1038/2241175a0
Abstract & References | PDF (366K)
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| | Evolution of Rifting in Africa 1178
R. W. GIRDLER, J. D. FAIRHEAD, R. C. SEARLE & W. T. C. SOWERBUTTS
doi:10.1038/2241178a0
Abstract & References | PDF (487K)
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| | Pulsars and Local Cosmic Ray Prehistory 1182
RICHARD E. LINGENFELTER
doi:10.1038/2241182a0
Abstract & References | PDF (525K)
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| | Letters | |
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| | Ionospheric Effect of X-rays from Scorpius XR-1 1187
I. G. POPPOFF & R. C. WHITTEN
doi:10.1038/2241187a0
First paragraph & References | PDF (185K)
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| | Distribution of Pulsar Duty Cycles 1188
G. R. HENRY & H.-J. PAIK
doi:10.1038/2241188a0
First paragraph & References | PDF (211K)
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| | Concerning the Energy Independence of the Velocity of Light 1189
BRUCE C. BROWN
doi:10.1038/2241189a0
First paragraph & References | PDF (115K)
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| | Relationship between the Unattached Fraction of Airborne RaA and the Concentration of Condensation Nuclei 1190
M. J. DUGGAN & D. M. HOWELL
doi:10.1038/2241190a0
First paragraph & References | PDF (271K)
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| | Plasma Acoustic Propagation in the Ionosphere 1191
R. S. IYENGAR
doi:10.1038/2241191a0
First paragraph & References | PDF (244K)
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| | Oscillatory Flow of a Jet into a Blind Cavity 1192
N. A. MOLLOY & P. L. TAYLOR
doi:10.1038/2241192a0
First paragraph & References | PDF (684K)
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| | Turbulent Diffusion of Heat in Jets of Dilute Polymer Solutions 1195
S. A. VLASOV & V. N. KALASHNIKOV
doi:10.1038/2241195a0
First paragraph & References | PDF (107K)
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| | Effect of Polymer Additive on Grid Turbulence 1196
C. A. GREATED
doi:10.1038/2241196a0
First paragraph & References | PDF (199K)
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| | Application of the Lifshitz Theory to the Calculation of Van der Waals Forces across Thin Lipid Films 1197
V. A. PARSEGIAN & B. W. NINHAM
doi:10.1038/2241197a0
First paragraph & References | PDF (237K)
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| | Oscillating Structure of Thermal Annealing of Radiation Damage revealed by Neutron Diffraction 1198
PAUL N. DIMOTAKIS
doi:10.1038/2241198a0
First paragraph & References | PDF (330K)
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| | Submicron Structure of "Amorphous" Opal 1199
RAYMOND T. GREER
doi:10.1038/2241199a0
First paragraph & References | PDF (321K)
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| | Conformation of Xylocholine 1200
P. COGGON, A. T. MCPHAIL & A. M. ROE
doi:10.1038/2241200a0
First paragraph & References | PDF (239K)
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| | Chemical Evidence concerning the Function of Molybdenum in Nitrogenase 1201
J. CHATT, J. R. DILWORTH, R. L. RICHARDS & J. R. SANDERS
doi:10.1038/2241201a0
First paragraph & References | PDF (258K)
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| | Hypothalamic Oestradiol-binding Macromolecules 1202
ARNOLD J. EISENFELD
doi:10.1038/2241202a0
First paragraph & References | PDF (260K)
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| | Effects of Lysine or Valine Starvation on Ribosome Subunit Balance in HeLa Cells 1203
B. E. H. MADEN
doi:10.1038/2241203a0
First paragraph & References | PDF (296K)
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| | Release of Migration Inhibitory Factors from Immune Rat Lymphocytes confronted with Histocompatibility Antigens 1206
R. E. FALK, L. COLLSTE & G. MÖLLER
doi:10.1038/2241206a0
First paragraph & References | PDF (239K)
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| | Lymphoid Inhibitor of Human Lymphocyte DNA Synthesis and Mitosis in vitro
1207
J. F. MOORHEAD, E. PARASKOVA-TCHERNOZENSKA, A. J. PIRRIE & C. HAYES
doi:10.1038/2241207a0
First paragraph & References | PDF (467K)
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| | Growth of Feline Leukaemia Virus in Human Cells 1208
OSWALD JARRETT, HELEN M. LAIRD & DAVID HAY
doi:10.1038/2241208a0
First paragraph & References | PDF (643K)
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| | Genome Size of Mycoplasmal DNA 1209
A. LETH BAK, FINN T. BLACK, C. CHRISTIANSEN & E. A. FREUNDT
doi:10.1038/2241209a0
First paragraph & References | PDF (420K)
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| | Base Compositions of DNA from some Malarial Parasites 1210
W. E. GUTTERIDGE, P. I. TRIGG & D. H. WILLIAMSON
doi:10.1038/2241210a0
First paragraph & References | PDF (275K)
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| | Synthesis of Cyclic AMP in Dictyostelium discoideum and Polysphondylium pallidum
1211
THEO M. KONIJN, YING-YING CHANG & JOHN T. BONNER
doi:10.1038/2241211a0
First paragraph & References | PDF (274K)
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| | Immunoglobulin Peptide with Complement Fixing Activity 1212
J. MICHAEL KEHOE & MICHEL FOUGEREAU
doi:10.1038/2241212a0
First paragraph & References | PDF (266K)
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| | Phosphogluconate Dehydrogenase Polymorphism in British Wild Rats 1214
N. D. CARTER & C. W. PARR
doi:10.1038/2241214a0
First paragraph & References | PDF (145K)
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| | Is Tay-Sachs Disease Increasing? 1214
R. F. SHAW & A. P. SMITH
doi:10.1038/2241214b0
First paragraph & References | PDF (256K)
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| | Potassium Conductance of Skeletal Muscle treated with Formaldehyde 1215
O. F. HUTTER
doi:10.1038/2241215a0
First paragraph & References | PDF (719K)
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| | Chemical Sterilization of Honey Bee Spermatozoa in vitro
1217
STEPHEN TABER III & ALEXEJ B. BO KOVEC
doi:10.1038/2241217a0
First paragraph & References | PDF (604K)
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| | Dieldrin and Eggshell Thickness in Ducks 1218
PHILIP N. LEHNER & ALLAN EGBERT
doi:10.1038/2241218a0
First paragraph & References | PDF (242K)
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| | Effect of DDT on Calcium Uptake and Vitamin D Metabolism in Birds 1219
DAVID B. PEAKALL
doi:10.1038/2241219a0
First paragraph & References | PDF (253K)
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| | Distribution of Dietary Squalene in a Wandering Albatross, Diomedea exultans
1220
R. W. LEWIS
doi:10.1038/2241220a0
First paragraph & References | PDF (259K)
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| | Identification of Chemicals triggering Cercarial Penetration Responses of Schistosoma mansoni
1221
AUSTIN J. MACINNIS
doi:10.1038/2241221a0
First paragraph & References | PDF (238K)
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| | Bark Beetle Attractants: Mechanism of Colonization by Dendroctonus frontalis
1222
J. A. A. RENWICK & J. P. VITÉ
doi:10.1038/2241222a0
First paragraph & References | PDF (244K)
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| | Comparison of the Sr/Ca Ratio of Fossil and Recent Mollusc Shells 1223
PAUL C. RAGLAND, ORRIN H. PILKEY & BLAKE W. BLACKWELDER
doi:10.1038/2241223a0
First paragraph & References | PDF (271K)
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| | Genotype, LSD and T-maze Learning in Mice 1224
J. H. STASIK & J. F. KIDWELL
doi:10.1038/2241224a0
First paragraph & References | PDF (277K)
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| | Some Effects of a Hallucinogenic Compound (Cyprenorphine Hydrochloride; M 285) on the Light Reinforced Behaviour of Rats 1226
G. LOWE & D. I. WILLIAMS
doi:10.1038/2241226a0
First paragraph & References | PDF (135K)
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| | Behavioural Differences between Chinese–American and European–American Newborns 1227
D. G. FREEDMAN & NINA CHINN FREEDMAN
doi:10.1038/2241227a0
PDF (128K)
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| | Cultivation of Haploid Plants from Tobacco Pollen 1227
N. SUNDERLAND & F. M. WICKS
doi:10.1038/2241227b0
First paragraph & References | PDF (531K)
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| | Uptake of Sulphur Dioxide by Barley Leaves at Low Sulphur Dioxide Concentrations 1229
D. J. SPEDDING
doi:10.1038/2241229a0
First paragraph & References | PDF (408K)
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| | Nitrogen Fixation by Gunnera–Nostoc Symbiosis 1231
W. B. SILVESTER & D. R. SMITH
doi:10.1038/2241231a0
First paragraph & References | PDF (122K)
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| | Phosphatase Release of Inorganic Phosphorus in Lake Kinneret 1231
T. BERMAN
doi:10.1038/2241231b0
First paragraph & References | PDF (231K)
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| | Book Reviews |  |
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| | Hill Land Management 1233
M. E. D. POORE reviews Ecology and Land Use in Upland Scotland
By
D. N. McVean & J. D. Lockie
doi:10.1038/2241233a0
PDF (129K)
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| | London'S Birdlife 1233
LANDSBOROUGH THOMSON reviews Birds in London
By
W. H. Hudson
doi:10.1038/2241233b0
PDF (129K)
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| | Links in the Energy Chain 1233
L. T. JONES reviews Advances in Marine Biology
Edited by
Sir Frederick S. Russell, Maurice Yonge, John Mauchline & Leonard R. Fisher
doi:10.1038/2241233c0
References | PDF (269K)
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| | Comprehensive Haematology 1234
M. P. ESNOUF reviews Blood Platelets in Man and Animals
By
Bernard Maupin
doi:10.1038/2241234a0
PDF (141K)
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| | Mother Ties 1234
LEONARD J. FRIEDMAN reviews Attachment of the Young
Imprinting and Other Developments. By
F. V. Smith
doi:10.1038/2241234b0
PDF (141K)
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| | Entropoy for Everybody 1234
SAMUEL D. SILVEY reviews Knowing and Guessing
A Quantitative Study of Inference and Information. By
Satosi Watanabe
doi:10.1038/2241234c0
PDF (290K)
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|
| | Colourful Foods 1235
MARY LINDLEY reviews The Oxford Book of Food Plants
By
S. G. Harrison, G. B. Masefield, Michael Wallis & B. E. Nicholson
doi:10.1038/2241235a0
PDF (140K)
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|
| | African Fossil Mammals 1235
R. J. G. SAVAGE reviews Fossil Vertebrates of Africa
Vol. 1. Edited by
L. S. B. Leakey
doi:10.1038/2241235b0
PDF (281K)
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| | Personal Petrology 1236
R. ST J. LAMBERT reviews Metamorphic Petrology
Mineralogical and Field Aspects. By
Francis J. Turner
doi:10.1038/2241236a0
PDF (141K)
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| | Transitional Relativity 1236
C. W. KILMISTER reviews Relativity and High Energy Physics
By
W. G. V. Rosser
doi:10.1038/2241236b0
PDF (267K)
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| | Masterful Papers 1237
J. V. ARMITAGE reviews Collected Papers of G. H. Hardy
doi:10.1038/2241237a0
PDF (126K)
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| | Correspondence | |
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| | "Deka-deci" Notation 1237
P. MOLYNEUX
doi:10.1038/2241237b0
PDF (257K)
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| | [Correspondence] 1238
doi:10.1038/2241238a0
PDF (245K)
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| | Reports and Publications | |
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| | Reports and Publications 1240
doi:10.1038/2241240a0
PDF (166K)
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