 Schneider held his first solo séance in 1919 and is said to have been able to summon the ghostly image of a human hand, as well as a number of other manifestations that are traditionally associated with séances.Schneider began giving demonstrations to the Vienna "Institut fur Radiumforschung der Academic der Wissenschaffen" in 1923.In an investigation into the mediumship of Schneider in 1924 the physicists Stefan Meyer and Karl Przibram caught Schneider evading the controls in a series of séances.