The concept of "negative green" was discovered by the French radiesthesist André de Belizal, along with his colleague, Léon Chaumery, in the early 20th century. Their work in radiesthesia, which involves the study and detection of subtle energy fields, led them to identify this unique frequency of energy.

The term "negative green" was chosen to describe this frequency due to its unique properties and effects:

1. Dual Nature: Negative green was found to have a dual nature, exhibiting both beneficial and harmful effects depending on its application and context. This duality is reminiscent of the concept of yin and yang in Eastern philosophy, where opposing forces are interconnected and interdependent. The term "negative" reflects its potential for destructive influence, while "green" connects it to the spectrum of visible light, specifically the green frequency.

2. Color Spectrum: In the study of radiesthesia, colors are often used to represent different frequencies of energy. Green is a central color in the visible spectrum and is associated with balance and harmony. By prefixing it with "negative," de Belizal and Chaumery highlighted its unique and somewhat paradoxical nature, distinguishing it from the more commonly understood positive green energy.

3. Radiesthetic Properties: Negative green was observed to have specific radiesthetic properties that set it apart from other frequencies. It was found to penetrate deeply into matter, making it useful in certain applications like dowsing and healing. However, its penetrating nature also meant it could be harmful if not used correctly, hence the cautionary "negative" descriptor.

4. Historical Context: The early 20th century was a time of significant exploration and discovery in the field of subtle energies and their effects on the human body and environment. De Belizal and Chaumery's work was part of a broader movement to understand and categorize these energies. The naming of negative green was a way to communicate its unique and somewhat unexplored characteristics within this emerging framework.

Negative green has been linked to ancient Egyptian practices. Some researchers believe that the Egyptians had an advanced understanding of subtle energies and used negative green in their architectural designs, particularly in the construction of pyramids and temples. This connection suggests that the knowledge of negative green may have ancient roots, rediscovered and reinterpreted by modern radiesthesists like de Belizal and Chaumery.

Understanding negative green and its properties can provide valuable insights into the interplay of energies in our environment and their impact on our well-being. It serves as a reminder of the complexity and depth of the unseen forces that shape our world.