"I know very well that many scientists consider dowsing as they do astrology, as a type of ancient superstition. According to my conviction this is, unjustified. The dowsing rod is a simple instrument which shows the uncanny reaction of the human nervous system to certain factors which are unknown to us at this time." - Albert Einstein *

Random Acts of Healing,: Using Pendulum Power to Heal Ourselves and Our Planet, Kac Young, PhD

Watching a dowser at work can be fascinating when they demonstrate how to find water or lost objects. Kac says one dowser was proficient enough at finding submarines  to be considered a national treasure. Resulting in a travel restriction - passport confiscated by the government - for safe keeping.

Kac is a life long dowser and teaches dowsing. Her book will guide you on how to use a pendulum as a tool for self-healing.

Summary: The book takes you through the history of the pendulum, how other seers, wizards, and magicians used it centuries ago, along with the instructions and guidance for how to use a pendulum correctly. It also provides you with step-by-step instructions as to how to find objects using a pendulum and many other answers. You receive a full course in emotional healing, chakra healing, archetypal healing, and even the use of Bach® Flower Remedies and essential oils.

Website: https://www.kacyoung.com/

*The town of Danville, Vermont has been the home of the American Society of Dowsers headquarters since 1961. The American Society of Dowsers has some 2,000 members that come from all across the United States. Many are hobbyists, but some work as professional dowsers. - Atlas Obscura

Arthur C. Clarke's World of Strange Powers. {Aired 1985} Demonstration of dowsing. IMDb Link.