"The earliest published work on growing terrestrial plants without soil was the 1627 book Sylva Sylvarum by Francis Bacon, printed a year after his death"
Having a hydroponics garden is a great way to reduce the amount of money spent monthly on common house hold herbs. Using a few household items one can easily build their own garden to start growing the herb of their own desire. People use this method to save money and grow things such as lettuces, tomatoes, celery, spring onions and herbs.
Hydroponically grown foods are ideally better tasting and better for you because they are not exposed to any form of pesticide and it is harder for them to become exposed to air born disease.
Creating your own system:
http://www.youtube.com/watch?v=DBME3l29G6Q
More detailed information:
http://www.hydroponics-simplified.com/hydroponic-plants.html
http://en.wikipedia.org/wiki/Hydroponics