1. Editorial note

   EditorialNotes Pages: i - i

2. The use of three-dimensional direct phase determining methods as applied to the K₂PtCl₆ derivative of ribonuclease

   • R. A. Palmer
   • S. K. Mazumdar

   OriginalPaper Pages: 107 - 120

3. Crystal structure of 5α-bromo-8β,9α-dimethyl-hydrindane-1,4-dione

   • J. D. Yordy
   • M. A. Neuman

   OriginalPaper Pages: 121 - 127

4. Crystal and molecular structure of 1,3-diphenyl-4-p-chlorobenzal-5-pyrazolone

   • Bruna Bovio
   • Stelio Locchi

   OriginalPaper Pages: 129 - 140

5. Crystal and molecular structure of the conjugated dienalp-Cl-C₆H₄-N(Ac)=CH-C(OAc)-CH=CH-CHO

   • W. A. Denne
   • M. F. Mackay

   OriginalPaper Pages: 141 - 148

6. Crystal structures of caesium and rubidium chlorochromates, CsCrO₃Cl and RbCrO₃Cl

   • J. J. Foster
   • Meta Sterns

   OriginalPaper Pages: 149 - 164

7. Vibrational spectra of bis-pyridine complexes of mercury(II) halides. A literature correction and structural implications

   • R. M. Barr
   • M. Goldstein
   • W. D. Unsworth

   OriginalPaper Pages: 165 - 171

8. Crystal and molecular structure of bis(N,N′-diethyldithiocarbamato)diphenylstannane, C₂₂H₃₀N₂S₄Sn

   • P. F. Lindley
   • Pamela Carr

   OriginalPaper Pages: 173 - 185

9. Isomer assignments in thep-dimethylaminoazoxybenzenes, and the crystal structure of β-p-dimethylaminoazoxybenzene

   • J. Browning
   • D. A. R. Happer
   • B. R. Penfold

   Note Pages: 187 - 191

10. The Poranthera corymbosa alkaloids, I

    • W. A. Denne
    • A. McL Mathieson

    Errata Pages: I - I

11. The Poranthera corymbosa alkaloids, II

    • W. A. Denne
    • A. McL Mathieson

    Errata Pages: I - I