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When we peel
an orange, walk through a rose garden or rub a sprig of lavender between our
fingers, we are all aware of the special scent of that plant.
But what exactly
is it that we can smell?
Generally speaking, it is essential oils which give
spices and herbs their specific scent and flavour and flowers and fruit their
perfume.
All essential oils are extracted from the plant kingdom, from flowers, herbs, trees, vegetables or spices. They are organic compounds that occur naturally in a wide variety of different plant species, and can be found in leaves (rosemary), bark (cinnamon), blossoms (neroli), fruit (orange), wood (cedar), resin (pine), roots (vetivert) and buds (clove).
They are called 'essential' because they not only capture the plant's fragrance, but also it's healing properties in a very concentrated way.
The main method of extraction is by steam distillation. This applies to the majority of herbal essences including lavender, thyme, rosemary and marjoram. Most citrus oils such as bergamot and orange are extracted by simple expression or pressure to the peel of the fruit. The more delicate perfume essences require a more complicated technique. Jasmine, neroli and rose for example are extracted using volatile solvents. Essential oils are the tools of the modern healing practice known as Aromatherapy.
The term 'Aromatherapy'
was first used in the 1920's but the knowledge of how to extract and apply essential
oils is a very ancient art. Aromatic plants and oils have been used for thousands
of years as perfumes, incense and cosmetics as well as for their medicinal and
culinary applications. The ancient Egyptian, Persian, India, Chinese and Arab
cultures made use of many aromatic oils, as did the early Greek and Roman civilisations.
But
like the old custom of using herbal 'simples', the practice of using aromatics
at home for health and pleasure is a forgotten and neglected tradition. At one
time, many houses had their own still-rooms. Even small cottages and farms had
fragrant herbs hanging from their rafters, and shelve were lined with rows of
aromatics contained in pots for scenting linen, sweet bags and clothes. The
herbs and oils were also employed as household remedies and used to maintain
a fragrant and hygienic environment.
Nowadays, the benefits of natural products is being re-assessed and re-evaluated. Introducing aromatics back into the home seems a healthy and enjoyable substitute for the many synthetic fragrances with which we are surrounded, and a valuable alternative to certain commonly used drugs. Current research confirms increasingly the value of many traditional remedies. The bactericidal, anti-septic, fungicidal and healing qualities of some essential oils, such as tea tree, have been shown through scientific research to be even more effective than many of their synthetic substitutes.