Water Divining and Dowsing

Dowsing, sometimes called divining or water witching, refers to the practice of detecting hidden or buried water, metals, gemstones, or other such objects without the use of scientific apparatus. Dowsers generally make use of a Y- or L-shaped twig, rod or pendulum to assist with detection, however some dowsers use other equipment or no equipment at all.
The dowser first determines which direction (left-right, up-down) will indicate “yes” and which “no,” before proceeding to ask the pendulum specific questions. In another form of divination, the pendulum is used with a pad or cloth that has “yes” and “no” written on it, and perhaps other words, written in a circle in the latter case. The person holding the pendulum aims to hold it as steadily as possible over the center. The client may pose questions to the person holding the pendulum, and it swings by minute unconscious bodily movement in the direction of the answer.
In the practice of radiesthesia a pendulum is used for medical diagnosis.