The aromatherapeutic power of essential oils has been understood and studied since the time of the ancient Egyptians. Today, the use of essential oils is growing rapidly as science confirms the benefits of these precious substances. Aromatic essences can have a direct effect on health, reduce stress levels, improve our outlook on life, and enhance our relationship with nature. This comprehensive reference book for beginners or experienced practitioners explains the history, properties, preparation and use of essential oils, with a cross-referenced listing of oils. 336 pp.