1. Checking linear hypothesis in factor evaluation by use of trend-surface gradients in the investigation of eolian deposits

   • M. A. Romanova

   OriginalPaper Pages: 231 - 240

2. Comparison of British and American Carboniferous cyclic rock sequences

   • Daniel F. Merriam

   OriginalPaper Pages: 241 - 264

3. Statistical analysis of mixed fossil populations

   • Benoy K. Ghose

   OriginalPaper Pages: 265 - 276

4. Determination of repose-period patterns of volcanoes from sequences of ash layers

   • Frans E. Wickman

   OriginalPaper Pages: 277 - 283

5. Principal components analysis of the geochemistry and mineralogy of the Portaskaig Tillite and Kiltyfanned Schist (Dalradian) of Co. Donegal, Eire

   • R. J. Howarth

   OriginalPaper Pages: 285 - 302

6. On the possibilities of using the power spectrum in some geological and geophysical problems

   • Radu Botezatu

   Short Notes Pages: 303 - 305

7. Null correlation for proportions—II

   • John N. Darroch
   • Douglas Ratcliff

   Short Notes Pages: 307 - 312

8. Evaluating qualitative phenomena by association technique

   • B. Soukup

   Short Notes Pages: 313 - 318

9. Multivariate prediction equations in geology

   • F. P. Agterberg

   Short Notes Pages: 319 - 324

10. The best plane through data

    • John R. Sturgul
    • Carlos Aiken

    Short Notes Pages: 325 - 331

11. A general view on the activity in the field of mathematical geology in Romania

    • Cristina Dumitriu
    • Al. Dimitriu

    Short Notes Pages: 333 - 334

12. Short report on mathematical geology in Czechoslovakia

    • Václav Němec

    Short Notes Pages: 335 - 336

13. Anwendung mathematischer Methoden und elektronischer Datenverarbeitungsanlagen für die Lösung geologischer Aufgaben in der Deutschen Demokratischen Republik

    • H. Knape

    Short Notes Pages: 337 - 337

14. Association announcements

    Announcement Pages: 339 - 342

15. Reviews

    • W. B. Hempkins
    • Václav Němec
    • John W. Harbaugh

    BookReview Pages: 343 - 348