The IAEA‐UNESCO Symposium on Inelastic Scattering of Neutrons in Solids and Liquids held September 10–14, 1962, at Chalk River, Ont., was the third international symposium since 1957 in this rapidly developing field. At the first meeting held in September 1957 in Stockholm, 11 papers from 6 countries were presented, whereas at the meeting just concluded, the program was limited to 65 papers from 13 countries. This growth reflects both the greater recognition by the physics community of this powerful experimental technique and the greater availability of nuclear machines to provide the neutron sources needed for measurements.