psychology at the University of Lemberg, co-director from 1907 of the Institut General Psychologique of Paris, distinguished psychical researcher.
Eusapia Palladino was his guest from November, 1893, until January, 1894, in Warsaw. His conclusions did not favour the spirit hypothesis and he expressed his conviction that the phenomena are due to a fluidic action and are performed at the expense of the medium's own powers and those of the persons present. The hypothesis that for the greater part of the phenomena a fluidic double can, under certain conditions, detach itself and act independently of the body of the medium, appeared to him to be necessary. After the Cambridge exposure he came to the defence of Eusapia and offered very plausible reasons for Eusapia's constant attempt to free her hand. He condemned the method employed at Cambridge as a blundering one.
The mediumship of Mlle. Tomczyk was discovered by Dr. Ochorowitz. His experiments with her are very important. He achieved conspicuous success in psychic photography, having photographed an etheric hand on a film rolled together and enclosed in a bottle, and objects suspended in the air without contact. For this, in 1911 the Comite d'Etude de Photographic Transcendental awarded him a prize of 1,000 francs. A similar prize was awarded to him by the Academic des Sciences de Paris.
Source (with minor modifications):
An Encyclopaedia of Psychic Science by Nandor Fodor (1934).