17 Juine 1966Vol. 152, No. 3729

LETTERS Political Protest on the Campus: A. Lepawsky; Draft, Not Draft-or a Better Way:C. J. Maloney; Fish Flour and Fluoride: D. M. Hadjimarkos; More onConservation: P. T. Flawn; G. R. Fahnestock; J. Munch ................... 1567

Changing Human Nature

ARTICLES Earthquake Prediction: F. Pre.ss and Wt. F. Brace

Recent developments reopen the question of the predictability of earthquakes.

NEWS AND COMMENT

BOOK REVIEWS

Hormonal Influences on Brain Organization in Infant Rats: S. Levine andR. F. Mullins, Jr. .......... ......

Hormones present during critical periods of development may exert a directaiction on the central nervous system.

Archeology in an Emergency: F. Johnson . ...........

The federal government's Inter-Agency Archaeological Salvage Program is 20years old.

The Training of an Astronomer: J. B. Irwin ...............................

The dilemma of graduate schools in astronomy is best solved by establishingtelescopes in good climates.

Grand Canyon: Colorado Dams Debated-International Science: New Vistas-Public Health Service: Reorganization Slated

Family Planininig and Population Programns, reviewed by I. B. Taeulber; otherreviews by R. T. Orr, J. W. Hedgpeth, W. D. Evans, S. Carlquist,J. J. Gon)or, B. E. Meserve: Conference and Symposium Reports .......... 1611

REPORTS Glaciated Appalachian Plateau: Till Shadows on Hills: D. R. Coates

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Methyl Radicals: Preparation and Stabilization: J. Turkevich and Y. Flujita .......... 1619

Oxygen Dependence of Retinal S-Potential-Producing Cells: K. Negishi andG. Svaetichii ......................................................... 1621

Sex Conversion in a Male Vitis vinifera L. by a Kinin: S. S. Negi and H. P. Olmo .... 1624

Nonthrombogenic Plastic Surfaces: R. I. Leininger et al. ......................... 1625

Lactoperoxidase: Identification and Isolation from Harderian and Lacrimal Glands:M. Morrison and P. Z. Allen .................... ......... 1626

Electrophoretic Heterogeneity of the Polypeptide Chains of Human G-MyelomaProteins: W. D. Terry, P. A. Smilall, Jr., R. A. Reisfeld ....................... 1628

Tritiated Norepinephrine: Release from Brain Slices by Electrical Stimulation:R. J. Baldessarini and I. J. Kopin ............................... 1630

Staining Tissue for Light and Electron Microscopy by Bridging Metals withMultidentate Ligands: J. S. Hanker et al. . ... ..1631

Mycotoxicoses: Toxic Fungi in Tobaccos: J. Forgacs and W. T. Carll ...... 1634

Growth-Hormone Deficiency in Man: An Isolated, Recessively Inherited Defect:D. L. Rimouin, T. J. Merisiee, V. A. McKulsick ............................ 1635

Input Resistance, Electrical Excitability, and Size of Ventral Horn Cells in CatSpinal Cord: D. Kernell ....................... ...... 1637

Heterosis: Complementation by Mitochondria: R. G. MfcDaniel and I. V. Sarkissian ... 1640

Maturation of a Stress-Activated Mlechanism Inhibiting Induction of TyrosineTransaminase: S. Schapiro, A. Yuwiler, E. Geller . ............. 1642

Eye and Head Movements in Peripheral Vision: Nature of Compensatory EyeMovements: A. E. Bartz ......................................... ..... 1644

Techinical Comments: Pesticide Residues in Total-Diet Samples: Bromine Content:R. E. Duig-an; Experimental Pain: R. Zenhausern, W. Moroney, R. Lepanto ... 1645

MEETINGS Dimethyl Sulfoxide: C. D. Leake; Forthcoming Events ... ..................... 1646

ACOVER

R' i Marble Canyon damisite,1p2½t mouilesnorth of Grand Canyon NationalMEDIAL~DENISTR i ~Park. Although the canyon is aboutStiton hane~A~strm ~3000 feet deep here, the dam would~ Krsh9er...............rise less than half way up the inner

~ATIt4 ND ~MMUtcATONflSATtTI~StU~gorge, which is 700 feet deep andC.SeerWilia C.COSWan400 feet wide. The dam's upper abut-ments would be imibedded in Redwallliniestone; its miiddle portions wouldbe in Cambrian dolomite and dolo-Mitic limiestone; and its lower part

.6 i~ A;_CO,O4$pr~i........woldbei Mauv formation. See~. ~rativi ~ni~page 1600. [John Santa, U.S. Bureau~~ n ~wt~a p~egre;~.of Reclamiation]

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152 (3729)

(3729), 1567-1650.152Science 

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of Science. No claim to original U.S. Government Works.Copyright © 1966 The Authors, some rights reserved; exclusive licensee American Association for the Advancement

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