Table of Contents

Articles

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  The incorporation of magnesium into the skeletal calcites of echinoderms

  Jon N. Weber

  American Journal of Science May 1969, 267 (5) 537-566; DOI: https://doi.org/10.2475/ajs.267.5.537
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  Correlation using a sedimentological model of part of the Hamilton group (middle Devonian), New York State

  I. N. McCave

  American Journal of Science May 1969, 267 (5) 567-591; DOI: https://doi.org/10.2475/ajs.267.5.567
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  The pre-natal roots of geology, a study in the history of ideas

  John W. Harrington

  American Journal of Science May 1969, 267 (5) 592-597; DOI: https://doi.org/10.2475/ajs.267.5.592
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  Strontium and magnesium contents of some natural peralkaline silicic glasses and their petrogenetic significance

  Donald C. Noble, Joseph Haffty and Carl E. Hedge

  American Journal of Science May 1969, 267 (5) 598-608; DOI: https://doi.org/10.2475/ajs.267.5.598
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  Melting reactions in the system KAlSi ₃ O ₈ -SiO ₂ -H ₂ O to 18.5 kilobars

  I. B. Lambert, J. K. Robertson and P. J. Wyllie

  American Journal of Science May 1969, 267 (5) 609-626; DOI: https://doi.org/10.2475/ajs.267.5.609
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  Gravity, deformation, and the Earth's crust [book review]

  G. M. Sowers

  American Journal of Science May 1969, 267 (5) 627-628; DOI: https://doi.org/10.2475/ajs.267.5.627
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  Basalts; the Poldervaart treatise on rocks of basaltic composition, Volume 2 [book review]

  D. S. Coombs

  American Journal of Science May 1969, 267 (5) 629; DOI: https://doi.org/10.2475/ajs.267.5.629
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  Government in Science; the U. S. Geological Survey, 1867-1894 [book review]

  W. W. Rubey

  American Journal of Science May 1969, 267 (5) 630-632; DOI: https://doi.org/10.2475/ajs.267.5.630