1. Scientific achievement —To serve the building of communist society

   BriefCommunication Pages: 493 - 494

2. M. V. Lomonosov and the problem of the structure of matter (on the 250th anniversary of his birth)

   • L. L. Potkov

   Announcement Pages: 495 - 501

3. Electron-diffraction study of the structure of the antimony (III) oxide molecule

   • P. A. Akishin
   • V. P. Spiridonov

   OriginalPaper Pages: 502 - 504

4. Electron-diffraction study of the structure of molecules with conjugated double bonds

   • P. A. Akishin
   • L. V. Viikov
   • N. I. Mochalova

   OriginalPaper Pages: 505 - 509

5. Coordination numbers of certain ions in aqueous solutions, and effect of temperature on them

   • M. N. Buslacva
   • O. Ya. Samollov

   OriginalPaper Pages: 510 - 515

6. Investigation of antioxidant radicals by the electron paramagnetic resonance method

   • A. L. Buchachenko
   • Ya. S. Lebedev
   • M. B. Neiman

   OriginalPaper Pages: 516 - 519

7. Comparative study of the Raman spectra of allyl silanes, germanes, and stannanes

   • Yu. P. Egorov
   • L. A. Leltes
   • V. F. Mironov

   OriginalPaper Pages: 520 - 525

8. Application of infrared spectroscopy to studies of the structure of certain complex compounds

   • L. A. Gribov
   • A. D. Gel'man

   OriginalPaper Pages: 526 - 528

9. The structure of the Cu₁₅Sl₄ type

   • P. I. Kripyakevich
   • E. I. Gladyshevskii

   OriginalPaper Pages: 529 - 533

10. X-ray diffraction determination of the homogeneity boundaries and nature of the β-NIS phase

    • V. G. Kuznetsov
    • A. A. Eliscev

    OriginalPaper Pages: 534 - 539

11. X-ray investigation of potassium polyuranates

    • L. M. Kovba
    • T. I. Churbakova

    OriginalPaper Pages: 540 - 544

12. Normal and defect structures of the pyrochlore type

    • Yu. A. Pyatenko

    OriginalPaper Pages: 545 - 548

13. Resolution of n-electron energy of aromatic condensed molecules by bonds by different variants of the simplest MO LCAO method

    • N. F. Stepanov
    • V. M. Tatevskii

    OriginalPaper Pages: 549 - 554

14. Use of density data for establishing the structure of aqueous electrolyte solutions

    • T. A. Nosova
    • O. Ya. Samoilov

    Brief Communications Pages: 555 - 558

15. Electron paramagnetic resonance spectra of radicals formed by irradiation of polypropylene

    • Ya. S. Lebedev
    • Yu. D. Tsvetkov

    Brief Communications Pages: 558 - 560

16. Crystal-chemical data on the salicylalbutyliminates of zinc, cobalt, nickel, and copper

    • P. M. Zorkii
    • E. F. Korytnyi
    • G. N. Tischenko

    Brief Communications Pages: 560 - 563

17. X-ray structural investigation of Co₂(C₅H₅)₅

    • O. V. Starovskii
    • Yu. T. Struchkov

    Brief Communications Pages: 563 - 565

18. Some structure data on crystalline polyvinyl chloride

    • E. E. Rylov
    • D. N. Bott
    • B. F. Teplov

    Brief Communications Pages: 566 - 568

19. Hardness of transition-metal nitrides

    • G. V. Samionov
    • T. S. Verkhoglyadova

    Brief Communications Pages: 569 - 571

20. Structural motifs of nickel and copper dialkyl glyoximates

    • M. A. Porai-Koshits

    Letters to the Editor Pages: 572 - 572

21. Concerning the paper by M. A. Porai-Koshits and P. M. Zorkii: “Structure relationships of internal complex compounds of copper and nickel”

    • E. A. Shugain
    • L. M. Shkol'nikova

    Letters to the Editor Pages: 573 - 574

22. Reply to the letter by E. A. Shugam and L. M. Shkol'nikova

    • M. A. Porai-Koshits
    • P. M. Zorkii

    Letters to the Editor Pages: 574 - 574

23. Theory and practice of direct methods of structure analysis of crystals

    • A. I. Kitaigorodskii
    • B. K. Vainshtein
    • Z. V. Zvonkova

    Review Pages: 575 - 590

24. Problems of Structural Chemistry at the Riga Conference

    • O. V. Starovskii

    Review Pages: 592 - 593

25. International Union of Crystallography Commission on Crystal Structure Data List of 1957 publications containing new data on crystal structures

    Bibliography Pages: 594 - 610