Advances in Molecular Spectroscopy, Volume 1 covers the proceedings of the Fourth Meeting of Molecular Spectroscopy, held in Bologna, Italy on September 7-12, 1959. This book is organized into three parts encompassing 69 chapters. The first part presents first some experimental and correlations studies on molecular structure, followed by discussions on the application of molecular spectroscopic techniques for molecular structure determination. Part II reviews experimental determination of Raman intensities, vibrations of aromatic rings, and IR spectra and electronic structure of various organic compounds. Part III considers the general theories on molecular spectroscopy. This topic is followed by surveys on electron energy, orbital valency, relations among potential energy of diatomic molecules, and determination of rotation structure. This book will be of value to molecular spectroscopists and analytical and organic chemists.