A CONFERENCE on liquid helium will be held at the Clarendon Laboratory, Oxford, during June 27-28. The programme includes discussions on the general and quantum theories of liquids (Prof. Max Born and pr. H. S. Green respectively), the 'cage' model of a liquid (Dr. H. N. V. Temperley), zero-point energy of thin helium films (Prof. N. F. Mott), properties of helium films (K. R. Atkins, J. B. Brown and Dr. K. Mendelssohn) and Heisenberg's new theory of superconductivity (Prof. M. H. L. Pryce). Particulars of the conference can be obtained from Prof. F. E. Simon, Clarendon Laboratory, Parks Road, Oxford.