Structure. X-ray crystallography and the nature of the chemical bond / Linus Pauling -- The significance of the hydrogen bond in physiology / Max F. Perutz -- Molecular recognition between protein and nucleic acids / Alexander Rich -- The impact of Linus Pauling on molecular biology : a reminiscence / Francis Crick -- How I became interested in the chemical bond : a reminiscence / Linus Pauling -- Dynamics. Chemistry in microtime / George Porter -- The transition state / John C. Polanyi --Chemical reaction dynamics and electronic structure / Dudley R. Herschbach -- Real-time laser femtochemistry : viewing the transition from reagents to products / Ahmed Zewail and Richard Bernstein.