| | Opinion |  |
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| | Pitfalls for National Science Foundation 343
doi:10.1038/230343a0
PDF (237K)
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| | When to Drop Out 344
doi:10.1038/230344a0
PDF (285K)
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| | Taxation and Women's Liberation 345
doi:10.1038/230345a0
PDF (164K)
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| | 100 Years Ago 345
doi:10.1038/230345b0
PDF (164K)
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| | Old World | |
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| | Further Education: CNAA Success Story 346
Our Education Correspondent
doi:10.1038/230346a0
PDF (134K)
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| | France: Clarifying Proposals 346
doi:10.1038/230346b0
PDF (135K)
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| | Pollution: Guillemots and PCBs 346
doi:10.1038/230346c0
PDF (268K)
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| | Computer Policy: Mediator Snags Aired 347
doi:10.1038/230347a0
PDF (139K)
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| | Parliament in Britain 347
doi:10.1038/230347b0
PDF (139K)
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| | New World | |
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| | New Brooms begin to Sweep 348
Our Special Correspondent
doi:10.1038/230348a0
PDF (256K)
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| | Environment: Detergers Deterred 349
Our Washington Correspondent
doi:10.1038/230349a0
PDF (270K)
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| | Meetings: Post-mortems on AAAS 350
doi:10.1038/230350a0
PDF (137K)
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| | News and Views |  |
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| | Controlling Chromosome loss 351
doi:10.1038/230351a0
PDF (123K)
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| | Lunar Origin Theories blow Hot and Cold 351
doi:10.1038/230351b0
PDF (252K)
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| | Earth's Crust: Hidden Transform Faults 352
Our Geomagnetism Correspondent
doi:10.1038/230352a0
PDF (134K)
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| | Bubble Chambers: New Ones on the Way 353
doi:10.1038/230353a0
PDF (138K)
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| | Slowing Down RNA Polymerase 353
doi:10.1038/230353b0
PDF (138K)
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| | Coleoptera: New Species of Metachroma
354
doi:10.1038/230354a0
PDF (137K)
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| | Polypeptides: Progress on Proinsulin 354
Our Molecular Biology Correspondent
doi:10.1038/230354b0
PDF (137K)
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| | Evidence of Charged Heavy Leptons 354
doi:10.1038/230354c0
PDF (137K)
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| | Nucleotides: Fluctuating Pools 355
Our Cell Biology Correspondent
doi:10.1038/230355a0
PDF (131K)
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| | Geometries of Molecular Oxygen Complexes 355
doi:10.1038/230355b0
PDF (131K)
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| | Orientation: Jumping Spider 355
Our Animal Behaviour Correspondent
doi:10.1038/230355c0
PDF (262K)
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| | Solids: New Superlattices 356
Our Materials Science Correspondent
doi:10.1038/230356a0
PDF (136K)
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| | Articles |  |
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| | A Century of Mathematical Reform 357
T. A. A. BROADBENT
doi:10.1038/230357a0
PDF (122K)
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| | Problems for the Coal Industry 358
RICHARD BAILEY
doi:10.1038/230358a0
Abstract & References | PDF (128K)
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| | Lunar Electrical Conductivity Profile 359
C. P. SONETT, D. S. COLBURN, P. DYAL, C. W. PARKIN, B. F. SMITH, G. SCHUBERT & K. SCHWARTZ
doi:10.1038/230359a0
Abstract & References | PDF (396K)
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| | Estimation of Secondary Structure in Ribonucleic Acids 362
IGNACIO TINOCO jun., OLKE C. UHLENBECK & MARK D. LEVINE
doi:10.1038/230362a0
Abstract & References | PDF (590K)
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| | Induction of Directional Chromosome Elimination in Somatic Cell Hybrids 367
G. PONTECORVO
doi:10.1038/230367a0
Abstract & References | PDF (403K)
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| | Fanconi's Anaemia in the Genetics of Neoplasia 370
MICHAEL SWIFT
doi:10.1038/230370a0
Abstract & References | PDF (420K)
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| | Letters | |
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| | Physical Sciences: Free Amino-acids dissolved in North Atlantic Ocean Waters 374
ROGER POCKLINGTON
doi:10.1038/230374a0
First paragraph & References | PDF (195K)
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| | Internal Cylindrical Reflexion in a Cubic Crystal 375
C. FORNO & O. C. JONES
doi:10.1038/230375a0
First paragraph & References | PDF (510K)
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| | Auger Electron Spectroscopy of Graphite Fibre Surfaces 377
G. L. CONNELL
doi:10.1038/230377a0
First paragraph & References | PDF (254K)
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| | Atmospheric Fluorine Compounds as Indicators of Air Movements 379
J. E. LOVELOCK
doi:10.1038/230379a0
First paragraph & References | PDF (122K)
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| | Reply to Cherry, Barnes and Fullman 379
K. S. CHUA
doi:10.1038/230379b0
References | PDF (122K)
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| | Fluid Orthodoxy ? 379
J. A. BARKER & D. HENDERSON
doi:10.1038/230379c0
First paragraph & References | PDF (237K)
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| | Fluid Orthodoxy ? 380
Our molecular physics correspondent
doi:10.1038/230380a0
PDF (121K)
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| | Biological Sciences: Adrenal Tyrosine Hydroxylase and Dopamine  -Hydroxylase in Spontaneously Hypertensive Rats 381
IKUKO NAGATSU, TOSHIHARU NAGATSU, KIMIKO MIZUTANI, HAMAO UMEZAWA, MEIKI MATSUZAKI & TOMIO TAKEUCHI
doi:10.1038/230381a0
First paragraph & References | PDF (217K)
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| | Purity and Stability of Synthetic Peptides such as Angiotensins and Kinins 382
J. R. VANE
doi:10.1038/230382a0
First paragraph & References | PDF (125K)
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| | Carcinogenic Effect of a Dimethyl Sulphoxide Extract of Betel Nut on the Mucosa of the Hamster Buccal Pouch 383
KAILASH SURI, HENRY M. GOLDMAN & HERBERT WELLS
doi:10.1038/230383a0
First paragraph & References | PDF (466K)
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| | Epidermal Antigens in Cutaneous Dysplasia and Neoplasia 384
H. K. MULLER & R. C. SUTHERLAND
doi:10.1038/230384a0
First paragraph & References | PDF (404K)
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| | Homotransplantation of Isolated Epiphyseal and Articular Cartilage Chondrocytes into Joint Surfaces of Rabbits 385
GEORGE BENTLEY & ROBERT B. GREER III
doi:10.1038/230385a0
First paragraph & References | PDF (599K)
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| | Use of Hydrated Polyphenylene Oxide Sulphonate Ion Exchange Membranes for Artificial Kidneys 388
A. B. LACONTI, J. F. ENOS & C. K. COLTON
doi:10.1038/230388a0
First paragraph & References | PDF (244K)
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| | Origin of Apparent Polyploid Spermatocytes in the Mouse 389
C. E. FORD & E. P. EVANS
doi:10.1038/230389a0
First paragraph & References | PDF (275K)
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| | Physiological Transport in Relation to Ageing 390
G. M. CHISOLM, E. N. TERRADO & J. L. GAINER
doi:10.1038/230390a0
First paragraph & References | PDF (487K)
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| | Initial Crystallin Synthesis and Lens Fibre Formation are Independent of Lens Morphogenesis 392
MAX BRAVERMAN & ARTHUR KATOH
doi:10.1038/230392a0
First paragraph & References | PDF (403K)
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| | Fluorescent Glucoside in the Human Lens 393
RUTH VAN HEYNINGEN
doi:10.1038/230393a0
First paragraph & References | PDF (216K)
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| | Effect of a Bright Light Flash on Dark Adaptation of Human Rods 394
MATHEW ALPERN
doi:10.1038/230394a0
First paragraph & References | PDF (294K)
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| | Excretion and Retention of Stable Strontium in Children 396
ALICE SUTTON, HILDA SHEPHERD, G. E. HARRISON & D. BARLTROP
doi:10.1038/230396a0
First paragraph & References | PDF (195K)
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| | Phosphatized Ostracods from the Cretaceous of Brazil 397
RAYMOND H. BATE
doi:10.1038/230397a0
First paragraph & References | PDF (341K)
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| | Is the New Composite Cranium from Swartkrans a Small Robust Australopithecine ? 398
M. H. WOLPOFF
doi:10.1038/230398a0
First paragraph & References | PDF (612K)
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| | Protection of Hermit Crabs (Dardanus spp.) from Octopus by Commensal Sea Anemones (Calliactis spp.) 401
D. M. Ross
doi:10.1038/230401a0
First paragraph & References | PDF (314K)
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| | Copper Tolerance in Becium homblei
403
C. REILLY & JANE STONE
doi:10.1038/230403a0
First paragraph & References | PDF (124K)
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| | Estimation of Ecological Production where Age of the Population is Unknown 403
C. P. MATHEWS & R. MEAD
doi:10.1038/230403b0
First paragraph & References | PDF (286K)
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| | Effects of Ethirimol on Cytological Characters in Barley 406
MICHAEL D. BENNETT
doi:10.1038/230406a0
First paragraph & References | PDF (128K)
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| | Pneumococci insensitive to Penicillin 407
DAVID HANSMAN, H. N. GLASGOW, JOHN STURT, LORRAINE DEVITT & R. M. DOUGLAS
doi:10.1038/230407a0
First paragraph & References | PDF (252K)
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| | Antischistosomal Action of Tubercidin administered after Absorption into Red Cells 408
J. J. JAFFE, E. MEYMARIAN & H. M. DOREMUS
doi:10.1038/230408a0
First paragraph & References | PDF (248K)
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| | Principle of Competitive Exclusion and Drosophila
409
RICHARD BOROWSKY
doi:10.1038/230409a0
First paragraph & References | PDF (248K)
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| | Book Reviews |  |
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| | Science and Humanity 411
ROGER LEWIN reviews Innovations:
Scientific, Technological and Social. By
Dennis Gabor and Engineers and Engineering
By
Lord Hinton
doi:10.1038/230411a0
PDF (111K)
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| | Outlook of Relativity 411
W. H. MCCREA reviews Talking About Relativity
By
J. L. Synge
doi:10.1038/230411b0
PDF (111K)
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| | Animal Systematics 412
R. A. CROWSON reviews Principles of Systematic Zoology
By
Ernst Mayr
doi:10.1038/230412a0
PDF (249K)
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| | Light, Time and Animals 412
D. S. SAUNDERS reviews Animal Photoperiodism
By
Brian Lofts
doi:10.1038/230412b0
PDF (249K)
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| | From the Camargue 412
doi:10.1038/230412c0
PDF (249K)
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| | Inside Plant Cells 413
J. BARBER reviews Plant Cell Physiology:
a Physicochemical Approach. By
Park S. Nobel
doi:10.1038/230413a0
PDF (135K)
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| | Physiology of Emotion 413
GEORGE W. ASHCROFT reviews Physiological Correlates of Emotion
Edited by
Perry Black
doi:10.1038/230413b0
PDF (135K)
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| | Pictures Computed 413
J. A. G. HALÉ reviews Computer Techniques in Image Processing
By
Harry C. Andrews
doi:10.1038/230413c0
PDF (260K)
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| | Nonlinear Problems 414
A. FONDA reviews Iterative Solution of Nonlinear Equations in Several Variables
By
J. M. Ortega & W. C. Rheinboldt
doi:10.1038/230414a0
PDF (130K)
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| | Guide to Examiners 414
J. G. WILSON reviews The Principles of Objective Testing in Physics
By
J. G. Houston
doi:10.1038/230414b0
PDF (130K)
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| | Crystal Structures 414
D. A. TURNER reviews Crystals and X-rays
By
H. S. Lipson
doi:10.1038/230414c0
PDF (130K)
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| | Obituary | |
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| | Professor D. G. Millar 415
doi:10.1038/230415a0
PDF (122K)
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| | Announcements | |
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| | Announcements 415
doi:10.1038/230415b0
PDF (240K)
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| | British Diary | |
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| | British Diary 416
doi:10.1038/230416a0
PDF (125K)
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| | Reports and Publications | |
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| | Reports and Publications 416
doi:10.1038/230416b0
PDF (125K)
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