Includes more than 80 essential oils. By Wanda Sellar. This is a practical directory of over 80 essential oils, covering many unusual oils as well as those that are in popular use. The oils are extensively categorised, with each entry offering valuable information at a glance. Helpful descriptions are given of the oils' aromas, their chemical constituents and their effects on the mind and body. Fascinating information is also included about the oils' histories, their extraction methods, and the myths and legends associated with them. There is also useful guidance on the effects of essential oils on the skin and their use in blends and treatments.