Calendar: 1951-1952 Page 403

ANNUAL REPORT xlvii Davies and Walker Μ An Apparatus for Ultra-violet Microscopy of Living Cells The Photographic Journal August 1950 Davies and Wilkins Μ Note on Method for the Rapid Focusing of Ultra-violet Refracting Microscopes on Living Material Journ Soy Micro Soc In the press Fraser Photographic Materials for use in the Ultra-violet Journ Sci Instr 27 no April 1950 M'Ewen and Mould "The Gelation of Montmorillonite Nature 166 437 September 9th 1950 Norris Reflecting Microscopes with Spherical Mirrors '' Nature In the press Price The Infra-red Spectra of some Metal Borohydrides Joum Chem Phys 17 1044 1949 Price Teegan and Walsh The Ultra-violet Absorption Spectra of the Hydrides and Deuter- ides of Sulphur Selenium and Tellurium and of the Methyl Derivatives of Hydrogen Sulphide Proc Roy Soc 201 600 1950 Randall Joint Editor of "Progress in Biophysics Vol Butterworth London 1950 Randall and Friedlaender Μ Microstructure of Ram Spermatozoa Exp Cell Research no 1950 Tomlin and Martin Technique for the Cultivation and Preparation of Tissue Cultures for Electron Microscopy Biochem et Biophys Acta pp 154-165 1950 Wilkins Μ Seeds Stokes and Oster Tobacco Mosaic Virus Crystals and Three-dimensional Micro- scopic Vision Nature 166 127 July 22nd 1950 Theoretical Physics Baldock Excited Electronic Levels in Conjugated Molecules valence-bond estimation of energy levels in aromatic hydrocar- bon molecules Proc Phys Soc 63A 585 1950