In the 1920s many experiments were performed in which Ossowiecki allegedly demonstrated clairvoyance (the ability to see objects in sealed containers) and astral projection (the ability to travel outside the body).
In 1927-28, after the German armed forces began in 1926 using the Enigma cipher machine, the Polish General Staff's Cipher Bureau, in Warsaw, attempted to solve the machine with the help of leading mathematicians and by resort to parapsychology, but not even Stefan Ossowiecki could help [REF].