The Danish psychical researcher and photographer Sven Turck conducted repeated tests of Jonsson’s psychokinetic powers, guarding against any possible trickery by creating strong controls in his laboratory. In Turck’s laboratory in Copenhagen, the researcher photographed Jonsson, together with a select group of psychic-sensitives, performing feats of psychokinesis. Turck set up three cameras at different angles, so that one always showed the action from behind, one from underneath, and one from above. After a series of sittings with the sensitives, chairs and objects began to move. A large worktable rose up on one leg and began to whirl around its own base, pirouetting faster and faster. Turck’s greatest wish was that they might get the table to soar freely in the air so that he might photograph the phenomenon of levitation. A few evenings later, the photographer was able to capture the fulfillment of his wish on the film of three cameras.
These phenomena were repeated often during the course of several months’ of sittings in Turck’s laboratory and were always dutifully recorded by the trio of cameras that had been loaded with infrared film. On one occasion, a large commode, of such a weight that two men could not lift it without great effort, was moved soundlessly out into the middle of the laboratory floor.
Author Stig Arne Kjellen said that Turck had never been able to believe in such dramatic displays of psychokinetic force until he had become a participant in the sessions held in his own laboratory. In principle, the psychokinetic moving of a candlestick is just as remarkable as the moving of a heavy table. Both feats are quite impossible in the view of orthodox science. The series of photographs taken during Turck’s experiments in Copenhagen were carefully examined by five of Denmark’s foremost photographic technicians, among them the director of the Danish photographic professional school, Theodore Andresen, who had full access to the photographic negatives. Each of the photographers agreed that no manipulations whatsoever had been worked upon the negatives.