| | Opinion |  |
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| | What Mr Heath Should Do 1185
doi:10.1038/2261185a0
PDF (347K)
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| | [Opinion] 1186
doi:10.1038/2261186a0
PDF (121K)
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| | Dr Sydney Chapman 1187
doi:10.1038/2261187a0
PDF (121K)
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| | 100 Years Ago 1187
doi:10.1038/2261187b0
PDF (121K)
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| | Old World | |
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| | Sanity Restored 1188
Our Soviet Correspondent
doi:10.1038/2261188a0
PDF (133K)
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| | Research Support: SRC Comes Nearly Clean 1188
doi:10.1038/2261188b0
PDF (306K)
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| | Radio Telescopes: Ready to go at Westerbok 1189
A Correspondent
doi:10.1038/2261189a0
PDF (174K)
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| | JOIDES: Briton on Twelfth Leg 1189
Our Geomagnetism Correspondent
doi:10.1038/2261189b0
PDF (294K)
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| | Soyuz-9: Per Ardua Ad Astra 1190
Our Soviet Correspondent
doi:10.1038/2261190a0
PDF (121K)
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| | Cancer: Research Prevents Prevention 1190
doi:10.1038/2261190b0
PDF (234K)
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| | Weather Satellites: Nimbus in the Infra-red 1191
doi:10.1038/2261191a0
PDF (114K)
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| | Science in the New Parliament 1191
doi:10.1038/2261191b0
PDF (249K)
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| | Costs Fall, Hopes Rise 1193
doi:10.1038/2261193a0
PDF (108K)
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| | New World | |
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| | Painful Transitions 1194
doi:10.1038/2261194a0
PDF (116K)
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| | Atomic Energy Commission: Candidate for Dismemberment 1194
doi:10.1038/2261194b0
PDF (238K)
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| | Environment: Simplified Committee Structure 1195
doi:10.1038/2261195a0
PDF (122K)
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| | Weather Modification: Restraints on Rainmakers 1195
doi:10.1038/2261195b0
PDF (122K)
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| | Oil Pollution: Shutdown Off Santa Barbara 1195
doi:10.1038/2261195c0
PDF (245K)
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| | Accelerator Reprieved? 1196
doi:10.1038/2261196a0
PDF (123K)
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| | Oceanography at Woods Hole 1196
doi:10.1038/2261196b0
PDF (123K)
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| | Creativity: Discipline for Imagination 1196
doi:10.1038/2261196c0
PDF (258K)
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| | Apollo 13: All but a Post-mortem 1197
doi:10.1038/2261197a0
PDF (135K)
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| | News and Views |  |
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| | Central Dogma Reversed 1198
doi:10.1038/2261198a0
PDF (233K)
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| | Advantages of an Antagonist 1199
doi:10.1038/2261199a0
PDF (239K)
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| | Botany: More than an Amorphous Mass 1200
doi:10.1038/2261200a0
PDF (122K)
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| | Proteins: Flourish of Factors 1200
Our Molecular Biology Correspondent
doi:10.1038/2261200b0
PDF (250K)
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| | Animal Viruses: Cells Modified 1201
Our Virology Correspondent
doi:10.1038/2261201a0
PDF (128K)
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| | Brain: Memory and Disorders 1201
A Correspondent
doi:10.1038/2261201b0
PDF (258K)
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| | Geology: Oldest Rocks on Earth 1202
A Correspondent
doi:10.1038/2261202a0
PDF (131K)
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| | Helium: Search in the Earth 1202
Our Geomagnetism Correspondent
doi:10.1038/2261202b0
PDF (257K)
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| | Interstellar Molecules: More Light on Interstellar H2
1203
Our Cosmology Correspondent
doi:10.1038/2261203a0
PDF (127K)
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| | Relativity: Einstein Rules the Waves 1203
doi:10.1038/2261203b0
PDF (127K)
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| | Articles |  |
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| | Three Phases of Chloroplast Research 1204
D. A. WALKER
doi:10.1038/2261204a0
Abstract & References | PDF (575K)
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| | Viral RNA-dependent DNA Polymerase: RNA-dependent DNA Polymerase in Virions of RNA Tumour Viruses 1209
DAVID BALTIMORE
doi:10.1038/2261209a0
Abstract & References | PDF (313K)
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| | Viral RNA-dependent DNA Polymerase: RNA-dependent DNA Polymerase in Virions of Rous Sarcoma Virus 1211
HOWARD M. TEMIN & SATOSHI MIZUTANI
doi:10.1038/2261211a0
References | PDF (315K)
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| | Assembly Mapping of 30S Ribosomal Proteins from E. coli
1214
SHOJI MIZUSHIMA & MASAYASU NOMURA
doi:10.1038/2261214a0
Abstract & References | PDF (608K)
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| | Initiation of RNA Synthesis: the Function of  in the Binding of RNA Polymerase to Promoter Sites 1219
EKKEHARD K. F. BAUTZ & FRIEDLINDE A. BAUTZ
doi:10.1038/2261219a0
Abstract & References | PDF (418K)
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| | GABA, Bicuculline and Central Inhibition 1222
D. R. CURTIS, A. W. DUGGAN, D. FELIX & G. A. R. JOHNSTON
doi:10.1038/2261222a0
Abstract & References | PDF (316K)
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| | The Atomic Structure of Tubular Subcrystals of  -Iron(III) Oxide Hydroxide 1225
K. J. GALLAGHER
doi:10.1038/2261225a0
Abstract & References | PDF (653K)
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| | No Demonstrable Long Term Effects of Cigarette Smoking on the Mucociliary Mechanism of the Human Lung 1228
D. PAVIA, M. D. SHORT & M. L. THOMSON
doi:10.1038/2261228a0
Abstract & References | PDF (469K)
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| | Absorption of Nicotine in Cigarette and Cigar Smoke through the Oral Mucosa 1231
A. K. ARMITAGE & D. M. TURNER
doi:10.1038/2261231a0
Abstract & References | PDF (202K)
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| | Letters | |
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| | Possible Pulsed Gamma Ray Emission from the Crab Nebula Pulsar 1233
W. N. CHARMAN & G. M. WHITE
doi:10.1038/2261233a0
First paragraph & References | PDF (120K)
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| | Pulsed Gamma Rays from the Crab Nebula ? 1233
J. P. DELVAILLE & B. MCBREEN
doi:10.1038/2261233b0
First paragraph & References | PDF (258K)
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| | Origin of Galactic Gamma Rays 1234
T. P. STECHER & F. W. STECKER
doi:10.1038/2261234a0
First paragraph & References | PDF (260K)
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| | Linear Polarization of MP 0628 and its Emission at Metre Wavelengths 1235
V. V. VITKEVICH & YU. P. SHITOV
doi:10.1038/2261235a0
First paragraph & References | PDF (240K)
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| | Filamentary Nebulosity in the Vicinity of Loop III 1236
K. H. ELLIOTT
doi:10.1038/2261236a0
First paragraph & References | PDF (118K)
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| | Lunar Radar Mapping: Correlation between Radar Reflectivity and Stratigraphy in North-western Mare Imbrium 1236
GERALD G. SCHABER, RICHARD E. EGGLETON & THOMAS W. THOMPSON
doi:10.1038/2261236b0
First paragraph & References | PDF (506K)
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| | Acoustic Coupling into the Ionosphere from Seismic Waves of the Earthquake at Kurile Islands on August 11, 1969 1239
P. F. WEAVER, P. C. YUEN, G. W. PROLSS & A. S. FURUMOTO
doi:10.1038/2261239a0
First paragraph & References | PDF (292K)
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| | Chain Formation of Fine Particle Aggregates 1241
D. N. SUTHERLAND
doi:10.1038/2261241a0
First paragraph & References | PDF (193K)
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| | Fractionation Factor of 18O between Water Vapour and Ice 1242
M. MAJOUBE
doi:10.1038/2261242a0
First paragraph & References | PDF (98K)
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| | Proton Hyperfine Coupling Constants in Radicals and the Effect of Orbital Overlap 1242
T. A. CLAXTON
doi:10.1038/2261242b0
First paragraph & References | PDF (222K)
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| | Performance of a Bacterial RNA Polymerase Factor in an Amphibian Oocyte 1243
M. CRIPPA & G. P. TOCCHINI-VALENTINI
doi:10.1038/2261243a0
First paragraph & References | PDF (244K)
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| | Subunit Composition of B. subtilis RNA Polymerase 1244
JESÚS AVILA, JOSÉ M. HERMOSO, ELADIO VIÑUELA & MARGARITA SALAS
doi:10.1038/2261244a0
First paragraph & References | PDF (237K)
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| | Crystallographic Study of Formylmethionine tRNA from Baker's Yeast 1246
C. D. JOHNSON, K. ADOLPH, J. J. ROSA, M. D. HALL & P. B. SIGLER
doi:10.1038/2261246a0
First paragraph & References | PDF (250K)
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| | High-energy Forms of Cytochrome b
1248
E. C. SLATER, C. P. LEE, J. A. BERDEN & H. J. WEGDAM
doi:10.1038/2261248a0
First paragraph & References | PDF (233K)
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| | Cytochrome Composition and Effect of Catalase on Growth of Agromyces ramnosus
1249
DOROTHY JONES, JOHN WATKINS & DAVID J. MEYER
doi:10.1038/2261249a0
First paragraph & References | PDF (249K)
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| | Reductant-activation of Inorganic Pyrophosphatase : an ATP-conserving Mechanism in Anaerobic Bacteria 1250
D. WARE & J. R. POSTGATE
doi:10.1038/2261250a0
First paragraph & References | PDF (255K)
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| | Effects of Intracellular ADP and Pi on the Sodium Pump of Squid Giant Axon 1251
P. DE WEER
doi:10.1038/2261251a0
First paragraph & References | PDF (223K)
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| | Anomalous Rectification and Electrogenic Sodium Transport in a Molluscan Neurone 1252
MICHAEL F. MARMOR
doi:10.1038/2261252a0
First paragraph & References | PDF (246K)
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| | Pinocytotic Vesicles and Ion Transport in Plant Cells 1253
J. L. HALL
doi:10.1038/2261253a0
First paragraph & References | PDF (321K)
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| | Anti- Antibodies for detecting Thymus-dependent Lymphocytes in the Immune Response of Mice to SRBC 1254
MICHAEL SCHLESINGER
doi:10.1038/2261254a0
First paragraph & References | PDF (423K)
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| | Relationship between Thymus-dependent Cells and Humoral Immunity 1256
ROBERT A. GOOD & WILLIAM A. CAIN
doi:10.1038/2261256a0
First paragraph & References | PDF (269K)
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| | Role of Thymus-derived Lymphocytes in the Secondary Humoral Immune Response in Mice 1257
MARTIN C. RAFF
doi:10.1038/2261257a0
First paragraph & References | PDF (257K)
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| | Inhibition of in vitro Immune Response by Treatment of Spleen Cell Suspensions with Anti- Serum 1258
ANNELIESE SCHIMPL & EBERHARD WECKER
doi:10.1038/2261258a0
First paragraph & References | PDF (255K)
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| | Structural Heterogeneity of Kidney Basement Membranes 1259
DOINA VELICAN & C. VELICAN
doi:10.1038/2261259a0
First paragraph & References | PDF (549K)
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| | Circadian Rhythm of Gastric Acid Secretion in Man 1261
J. G. MOORE & E. ENGLERT JUN.
doi:10.1038/2261261a0
First paragraph & References | PDF (239K)
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| | Prevention of Pregnancy in the Rabbit by Subcutaneous Implantation of Silastic Tube containing Oestrogen 1262
M. C. CHANG, J. H. CASAS & DOROTHY M. HUNT
doi:10.1038/2261262a0
First paragraph & References | PDF (239K)
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| | Muscular Dystrophy: Evidence for a Neural Factor 1263
A. J. MCCOMAS, R. E. P. SICA & S. CURRIE
doi:10.1038/2261263a0
First paragraph & References | PDF (238K)
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| | Postmortem Leucocyte Culture Studies in Sudden Infant Death 1264
SIDNEY B. WEINBERG & BARBARA A. PURDY
doi:10.1038/2261264a0
First paragraph & References | PDF (270K)
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| | Pharmacology of some Marijuana Constituents and Two Heterocyclic Analogues 1265
WILLIAM L. DEWEY, LOUIS S. HARRIS, JOHN F. HOWES, J. STEPHEN KENNEDY, FELIX E. GRANCHELLI, HARRY G. PARS & RAJ K. RAZDAN
doi:10.1038/2261265a0
First paragraph & References | PDF (405K)
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| | Detailed Texture of Eidetic Images : a Discussion 1267
COLIN BLAKEMORE, OLIVER BRADDICK & R. L. GREGORY
doi:10.1038/2261267a0
First paragraph & References | PDF (239K)
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| | Mandible of Archaeopteryx provides an Example of Mosaic Evolution 1268
JOEL CRACRAFT
doi:10.1038/2261268a0
First paragraph & References | PDF (108K)
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| | Book Reviews |  |
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| | Master and Disciple 1269
R. N. RAPOPORT reviews Brother Animal
The Story of Freud and Tausk. By
Paul Roazen
doi:10.1038/2261269a0
PDF (129K)
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| | Alarm Bells 1269
D. R. COPE reviews The Optimum Population for Britain
Proceedings of a Symposium held at the Royal Geographical Society, London, on 25th and 26th September, 1969. Edited by
L. R. Taylor
doi:10.1038/2261269b0
PDF (262K)
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|
| | Europe Before the Greeks 1270
GLYN DANIEL reviews Prehistoric Europe
From Stone Age Man to the Early Greeks. By
Philip Van Doren Stern
doi:10.1038/2261270a0
PDF (133K)
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| | Man's Ancestry 1270
JOHN NAPIER reviews The Evolution of Man
By
David Pilbeam
doi:10.1038/2261270b0
PDF (264K)
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| | Twin Births 1271
C. O. CARTER reviews The Biology of Twinning in Man
By
M. G. Bulmer
doi:10.1038/2261271a0
PDF (131K)
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| | Mother−Child Interaction 1271
R. S. ILLINGWORTH reviews Stimulation in Early Infancy
Edited by
Anthony Ambrose
doi:10.1038/2261271b0
PDF (131K)
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| | Liver Transplants 1271
R. A. SELLS reviews Experience in Hepatic Transplantation
By
Thomas E. Starzl
doi:10.1038/2261271c0
PDF (267K)
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| | Reptiles in the Round 1272
GARTH UNDERWOOD reviews The Life of Reptiles
By
Angus Bellairs
doi:10.1038/2261272a0
PDF (136K)
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| | Equilibria in Solution 1272
D. W. A. SHARP reviews Chemistry of Complex Equilibria
By
M. T. Beck
doi:10.1038/2261272b0
PDF (267K)
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| | Azomethine Chemistry 1273
PETER SYKES reviews The Chemistry of the Carbon−Nitrogen Double Bond
Edited by
Saul Patai
doi:10.1038/2261273a0
PDF (132K)
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|
| | Protein Transformations 1273
SHERRY LEWIN reviews Multiple Equilibria in Proteins
By
Jacinto Steinhardt & Jacqueline A. Reynolds
doi:10.1038/2261273b0
References | PDF (263K)
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| | Elementary Oceanography 1274
J. P. RILEY reviews Oceanography
An Introduction to the Marine Environment. By
Peter K. Weyl
doi:10.1038/2261274a0
PDF (132K)
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| | Masses of Ice 1274
JOHN W. GLEN reviews The Physics of Glaciers
By
W. S. B. Paterson
doi:10.1038/2261274b0
PDF (266K)
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|
| | Waveguides 1275
P. J. B. CLARRICOATS reviews Millimetre and Submillimetre Waves
Edited by
F. A. Benson
doi:10.1038/2261275a0
PDF (135K)
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| | Wind-Swept Earth 1275
DAVID W. HUGHES reviews Introduction to the Solar Wind
By
J. C. Brandt
doi:10.1038/2261275b0
PDF (135K)
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| | Space Plasma Journal 1275
P. C. KENDALL reviews Cosmic Electrodynamics
An International Journal devoted to Geophysical and Astrophysical Plasmas. Edited by
C. P. Sonnet
doi:10.1038/2261275c0
PDF (269K)
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| | Applied Maths 1276
A. H. CRAVEN reviews Computational Methods in Partial Differential Equations
By
A. R. Mitchell and Numerical Methods for Partial Differential Equations
By
William F. Ames
doi:10.1038/2261276a0
PDF (134K)
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| | Introduction to the Stars 1276
JOHN GRIBBIN reviews The Stars
Their Structure and Evolution. By
R. J. Tayler
doi:10.1038/2261276b0
PDF (134K)
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| | Correspondence | |
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| | Shaving to Impress 1277
R. M. HARDISTY
doi:10.1038/2261277a0
PDF (114K)
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| | Just Thick-skinned ... ? 1277
A. F. HUXLEY
doi:10.1038/2261277b0
References | PDF (114K)
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| | ... or Piloerection ? 1277
W. S. BULLOUGH
doi:10.1038/2261277c0
References | PDF (114K)
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| | Sleepless Harvest 1278
D. S. PARSONS
doi:10.1038/2261278a0
References | PDF (118K)
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| | A Leaf from Lysistrata 1278
C. B. GOODHART
doi:10.1038/2261278b0
PDF (118K)
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| | When Desire Fails 1278
H. A. COOK
doi:10.1038/2261278c0
PDF (118K)
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| | [Correspondence] 1278
ANON
doi:10.1038/2261278d0
PDF (118K)
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|
| | Announcements | |
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| | Announcements 1279
doi:10.1038/2261279a0
PDF (108K)
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| | Erratum | |
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| | Erratum 1279
doi:10.1038/2261279b0
PDF (108K)
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| | British Dairy | |
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| | British Diary 1280
doi:10.1038/2261280a0
PDF (143K)
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| | Reports and Publications | |
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| | Reports and Publications 1280
doi:10.1038/2261280b0
PDF (143K)
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