Pleasant fall weather added to the high spirits and congeniality of a group of physicists and chemists attending a symposium on molecular excitons as guests of duPont's Central Research Department. Their common interest in excitons had attracted participants from academic and research institutions across the country, and from Canada as well. Welcoming the visitors, Central Research Director P. L. Salzberg announced that the symposium marked the belated dedication of the site of the meeting, duPont's newly constructed Physical Research Building.