In 1967 Hans Jenny, a student of the anthroposophist Rudolf Steiner, published the first of two volumes in German entitled Kymatic ; the second was published posthumously in 1972.) In 2001, MACROmedia Publishing created a composite of these two volumes in English. Quite recently, in March 2024, they reissued an extensively revised version of this composite edition with notes and commentaries by leading experts in the fields of acoustics, the arts, and sound therapies.) He showed the evolution of harmonic images by subjecting inert substances to oscillating sound waves. His substantial body of work based on rigorous scientific methodology, developed Chladni's experiments, highlighting intricate, organic, harmonic images that reflected many universal patterns found throughout nature and especially living organisms. Jenny spread powders, pastes, and liquids on a metal plate connected to an oscillator which could produce a broad spectrum of frequencies. The substances were organized into different structures characterized by geometric shapes typical of the frequency of the vibration emitted by the oscillator. According to Jenny, these structures, reminiscent of the mandala and other forms recurring in nature, would be a manifestation of an invisible force field of the vibrational energy that generated it. He was particularly impressed by an observation that imposing a vocalization in ancient Sanskrit of Om (regarded by Hindus and Buddhists as the sound of creation) the lycopodium powder formed a circle with a centre point, one of the ways in which Om had been represented.