Abstract: THE president of the Royal Society, Sir Robert Robinson, presided at a meeting held at the Society for Visiting Scientists on March 9, in memory of the late Louie Rapkine. The chief guests were the French ambassador and Madame Sarah Rapkine. Mile. A. Deloyers and Prof. Francis Perrin represented the commissariat á 1'Energie Atomique, and Dr. Magat 'the Centre National de la Recherche Scienti-fique5 Dr. A. M. Lwoff of the Pasteur Institute, Prof. S. Mandelbrojt of the Collé ge de France, Prof. J. Hadamard and Dr. A. Mirlés also attended from France.