12 October 19733 7.u' ; 9Volume 182, No. 4108

LETTERS NIH Grants and Contracts: L. Jacobs; Long-Distance Runners: T. J. Bassler;Quality of Statistics: S. M. Pollock; W. Kruskal; Heritability ofIntelligence: P. Bohannan; H. Arp; W. Seeman; Historical Footnote:M. Lomask; Fractionation Services: M. Wickerhauser...................

EDITORIAL A New International Program ......................................

ARTICLES Power, Fresh Water, and Food from Cold, Deep Sea Water: D. F. Othmer and0. A. Roels ...........................................

Estrogen-Receptor Interaction: E. V. Jensen and E. R. DeSombre ..........Computing in China: A Travel Report: T. E. Cheatham, Jr., et al...........

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NEWS AND COMMENT

RESEARCH NEWS

BOOK REVIEWS

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134

PSAC: Last Hurrah from Panel on Youth ............................ 141Timber Study Reinforces Nixon Policy .............................. 144Sweden: Naderism Blooms in the North Country ........................ 145Sorghum: "Miracle" Grain for the World Protein Shortage? .... ............ 147

Cyclic GMP: Cellular Regulatory Agent? .............................. 149Optical Communications: Specialized Applications Appear First .... ........... 151

Phytochrome and Lectures on Photomorphogenesis, reviewed by R. L. Satter;Animal Cytology and Evolution, C. P. Swanson; Distribution and Ecologyof Living Benthic Foraminiferids, W. H. Berger; The Nutrition Factor,C. E. Taylor; Geothermal Energy, J. Combs ......................... 153

B00-:IIOARD or DIRtECTORStX GLENN T. SEABORG LEONARD M. RIESER ROGER REVELLE RICHARD H. BOLT BARRY COMMONERRetiring President, Chairman President President-Elect LEWIS IM BRANSCOMB EMILIO Q. DADDARI

CHAIRMEN AND: MATHEMATICS (A) -PHYSiC (B) CHEMISTRY (C) ASTRONOMY (0)SECRETARIES;i: OP :;: :Lipman Bers lEdwin M. McMillan Thomas E. Taylor Frank D. DrakeSECRETARIES~w~~ OFF. A. Ficken Rolf .: Sinclair Leo $Schubert Arlo U. LandoltAAAS SECTIONS

PSYCHOLOGY 0i) SOCIAL AND ECONOMICISCIENCES (KDISOY AND. PHILOSOPHY OF SCIENCE;Car P. Dunan Robert K.:KMerton Ern NeeWllfam*Dn0. Grvey Harvey Sapolky Dudley Shavers,

INDUSTRIAL SCIENCE (P) EDUCATION (Q) DENTISTRY (R) PHARMACEUTICAL SCIENCESJacob E. Goldman Gordon Swiason Mati Cattoni william Halear.

JordanDLewis ~ ~ ~ ~ i~ Philip R FordCie Soo PeranJohn AutienDIV-00t:0:;0ISIONS 000000 00 0:; 0X0ALASKA DIVISION PACIFIC DIVON UM EN AND ROCKY MOUNTAIN DIVISI

Gunter E. Weller Irmaunn R C.DucaRo CMiller Robert T 0rr Max P. Dunfordst2 oB 0 4 0 0 t l> 00000 0; Pr ldt 0: tfi#:SS w ::0: .100:t es Exectiv Sectbry0Peiet EetieSrPresidereiet ertry-Treasurer PrWesden xctv ertr-

SCIENEIs ublIsed wekly, xceptthe last weetk In Decembr bu ih netr Issue, on thefouth-Uesday in November,b the Amerlce sscato for th*Avaceet-aoo.-^I-:.. 0: : a wA.n&*a;atnnul uhrlan5ffnt-raiun noamtne!mericait 'oa lift Ato Eurone S

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AMERICAN ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE

REPORTS Stability of Catecholamines and Propranolol Covalently Bound to Sepharoseand Glass Beads: M. S. Yong ................................... 157

The 25-km Discontinuity: Implications for Lunar History: G. Simmons,T. Todd, H. Wang ........................................... 158

Earthquake-Induced Structures in Sediments of Van Norman Lake,San Fernando, California: J. D. Sins .............................. 161

Mutations in Immunoglobulin-Producing Mouse Myeloma Cells: K. Baumnal et al. 164

Overeating and Obesity from Damage to a Noradrenergic System in the Brain:J. E. Ahlskog and B. G. Hoebel .................................. 166

Amphibian Pituitary Growth Hormone and Prolactin: Immunochemical Relatednessto Rat Growth Hormone: T. Hayashida, P. Licht, C. S. Nicoll .... ......... 169

Lack of Glucagon Response to Hypoglycemia in Diabetes: Evidence for anIntrinsic Pancreatic Alpha Cell Defect: J. E. Gerich et al ................. 171

Sphaeroma terebrans: A Threat to the Mangroves of Southwestern Florida:A. Rehm and H. J. Humm ..................................... 173

Instrumental Conditioning of Large-Magnitude, Daily, 12-Hour Blood PressureElevations in the Baboon: A. H. Harris et al .......................... 175

Electrical Signs of Selective Attention in the Human Brain: S. A. Hillyard et al ... 177

7echniical Comments: Axonal Transport-Simple Diffusion?: A. Magid;H. A. Fischer and E. Schmatolla ................................. 180

MEETING REPORT Human Histocompatibility Antigens and Susceptibility to Disease:D. B. Amos, T. Inou, D. T. Rowlands, Jr........................

PRODUCTS AND Scanning Electron Microscope; Portable pH Meter; Linear FractionMATERIALS Collector; Radiographic Imaging System; Literature.

EDWARD E. DAVID, JR. CARYL P. KASKINS WILLIAM T. GOLDEN WILLIAM BEVANWARD H. GOODENOUGH PHYLLIS V. PARKINS Treasurer Executive Officer

GEOLOGY AND GEOGRAPHY (E) BIOLOGICAL SCIENCES (G) ANTHROPOLOGY (H)Helmut Landsberg Dorothy Bliss Richard N. AdamsRamon E. Bisque Richard J. Goss Anthony LeedsENGINEERING (M) MEDICAL SCIENCES (N) AGRICULTURE (0)Raynor L. Duncomibe Robert A. Good Roy L. LovvornC. Towner French F. Douglas Lawrason Michael A. FarrellINFORMATION AND STATISTICS (U) ATMOSPHERIC AND HYDROSPHERICCOMMUNICATION (T) Frederick Mosteller SCIENCES (W)

Jordan Baruch Ezra Glaser Max A. KohlerScott Adams Louis J. Bafttn

COVER

Destruction of prop roots of red man-grove tree was the work of an isopodcrustacean, Sphaeroma terebrans, awood borer that is causing a progres-sive shrinking of the Ten ThousandIslands of the Everglades NationalPark off southwestern Florida. Seepage 173. [George Morrison, Na-tional Park Service]

The American Association for the Advancement of Science was founded in 1848 and inco in

1874.: Its oblects are to further the work of scientist, to facilitate cooperation amongthm, tompre effetIvene of sdience In the promotion of human welfare, and to incr"se public under-

standing end appriationt of the Imp nce and romise of the memods of sdcnce in human porogrs.P, V.ii1 V7 DV -i

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