9 December 1977

Volume 198, No. 4321

LETTERS International Science Panel: F. Press; W. D. Carey; Solar Energy: The Prospectsfor OTEC: W. F. Whitmore; W. H. Avery, M. A. Duguay; W. D. Metz .

EDITORIAL Is There a Crisis of Confidence in Science?: C. Z. Nunn.

ARTICLES The Oceanic Microcosm of Particles: D. Lal.

Beef Production Efficiency: A. Trenkle and R. L. Willham .

NEWS AND COMMENT Chemical Plants Leave Unexpected Legacy for Two Virginia Rivers. . . . . . . . . 1015

Briefing: Getting and Hogan Win IEEE Races; Contretemps on Capitol Hill;... and Meanwhile in the Caribbean . . . . . . . . . . . . . . . . . . . . . . 1018

President Gives Science Medals . . . . . . . . . . . . . . . . . . . . . . . . . . . 1020

Medical Research in England: New Director Seeks to Boost Morale . . . . . . . . . 1021

Point ofView: Press Decries "Technological Optimists . . . . . . . . . . . . . . . 1022

RESEARCH NEWS Oil Shale: Prospects on the Upswing ... Again . . . . . . . . . . . . . . . .

BOOK REVIEWS Comprehensive Biochemistry, reviewed by R. Olby; Theory and Practice ofBiological Control, M. J. Way; Biological Reactive Intermediates,

M. R. Franklin; Structural Chemistry of Layer-Tape Phases, F. Disalvo;

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Fate and Effects of Petroleum Hydrocarbons in Marine Ecosystems andOrganisms, P. A. Meyers; Books Received and Book Order Service . . . . . . 1028

REPORTS Carbon Monoxide on Jupiter and Implications for Atmospheric Convection:R. G. Prinn and S. S. Barshay . . . . . . . . . . . . . . . . . . . . . . . . . . 1031

Minimum Size of Mammalian Homeotherns: Role of the Thermal Environment:C. R. Tracy ...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1034

Implications of Solar Evolution for the Earth's Early Atmosphere:M. J. Newman and R. T. Rood . . . . . . . . . . . . . . . . . . . . . . . . . . 1035

High Pressures on Small Areas: A. L. Ruoffand J. Wanagel . . . . . . . . . . . . . 1037

Immunofluorescence Localization of Proteins of High Molecular Weight AlongIntracellular Microtubules: P. Sherline and K. Schiavone . . . . . . . . . . . . 1038

Construction of Chimeric Phages and Plasmids Containing the Origin ofReplication of Bacteriophage Lambda: D. D. Moore et al .. . . . . . . . . . . . 1041

Genetic Structure of the Replication Origin of Bacteriophage Lambda:M. E. Furth et al .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1046

Physical Structure of the Replication Origin of Bacteriophage Lambda:K. Denniston-Thompson et al .. . . . . . . . . . . . . . . . . . . . . . . . . . 1051

Expression in Escherichia coli of a Chemically Synthesized Gene for the HormoneSomatostatin: K. Itakura et al .. . . . . . . . . . . . . . . . . . . . . . . . . . 1056

Cytidine 3',5'-Monophosphate (Cyclic CMP) Formation in Mammalian Tissues:S. Y. Cech and L. J. Ignarro . . . . . . . . . . . . . . . . . . . . . . . . . . . 1063

Hunger in Humans Induced by 2-Deoxy-D-Glucose: Glucoprivic Control of TastePreference and Food Intake: D. A. Thompson and R. G. Campbell . . . . . . . 1065

Hepatitis B "e" Antigen: An Apparent Association with Lactate DehydrogenaseIsozyme-5: G. N. Vyas et al .. . . . . . . . . . . . . . . . . . . . . . . . . . . 1068

Group-Specific Component: Evidence for Two Subtypes of the Gcl Gene:J. Constans and M. Viau . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1070l a l | l l ~~~~~~COVER

Suspended material (scanning electronmicrograph) collected by filtration oflarge volumes of Pacific surface waters(40°N, 160°E). Particles are a variety ofmicroscopic marine plants (mostly coc-colithophores and some diatoms) andanimals. The most abundant coccoliths,3 to 4 micrometers in diameter withrays, belong to the species Emilianiahuxleyi. Hard skeletal parts of biogenicparticles fall from surface to deep wa-ters. At all depths, they dominate thesuspended phases and their dissolutionand attrition, in course of settling, has.an important effect on the chemistry of

_ seawater (field of view: about 45 X 50micrometers). See page 997. [V. P'Shah, Physical Research LaboaoyAhmedabad,Iia~

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198 (4321)

(4321), 988-1078.198Science 

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