Preface. Part I. Aromatherapy: Philosophical and Theoretical Perspectives. 1. From Historical Origins to the Present Day: The Philosophies of the Pioneers and Influential Thinkers. 2. Theoretical Perspectives. Part II. Approaches to Creating Essential Oil Synergy. 3. Synergy and Antagonism. 4. Maury's Individual Prescription and its Derivatives. 5. Functional Group Influence and the Molecular Appr...