As von Reichenbach was investigating the manner in which the human
nervous system could be affected by various substances, he conceived the existence of a new force allied to
electricity,
magnetism, and
heat, a force which he thought was radiated by most substances, and to the influence of which different people are variously
sensitive. He named this
vitalist concept
Odic force. Proponents say that Odic force permeates all plants, animals, and humans. Believers in Odic force said that it was visible in total darkness as colored
auras surrounding living things, crystals, and magnets, but that viewing it required hours first spent in total darkness, and only very sensitive people had the ability to see it. They also said that it resembles the Asian concepts
prana and
qi. However, they regarded the
Odic force as not associated with breath (like
India's prana and the qi of Chinese martial arts) but rather mainly with
biological electromagnetic fields. Von Reichenbach did not tie Odic force into other vitalist theories. Baron von Reichenbach expounded the concept of Odic force in detail in a book-length article,
Researches on Magnetism,
Electricity,
Heat and Light in their Relations to Vital Forces, which appeared in a special issue of a respected scientific journal, . He said that (1) the Odic force had a positive and negative
flux, and a light and dark side; (2) individuals could forcefully "emanate" it, particularly from the hands, mouth, and forehead; and (3) the Odic force had many possible applications. The Odic force was conjectured to explain the phenomenon of
hypnotism. In
Britain, impetus was given to this view of the subject following the translation of Reichenbach's
Researches by
William Gregory, professor of
chemistry at the
University of Edinburgh. These later researches tried to show many of the Odic phenomena to be of the same nature as those described previously by
Franz Mesmer and even long before Mesmer by
Emanuel Swedenborg. The French parapsychologists
Hippolyte Baraduc and
Albert de Rochas were influenced by the concept of the Odic force. Von Reichenbach hoped to develop scientific proof for a universal life force; however, his experiments relied on perceptions reported by individuals who claimed to be "sensitive", as he himself could not observe any of the reported phenomena. The "sensitives" had to work in total or near-total darkness to be able to observe the phenomena. Reichenbach stated that, through experimentation, possibly one-third of the population could view the phenomenon, but far less otherwise. == Scientific reception ==