This experiment was held on 1st June 1912 with Mme. Bisson and Prof.
Below are two
remarkable materialisation photographs of Alexandre Bisson - the
husband of Mme. Bisson - and the
entity named "Berthe".
Schrenck-Notzing gave a very interesting account of this experiment in
his book Phenomena of Materialisations. A section of it
reads (pg.165) - "In spite of the three flash-light exposures, the
phenomena continued. The structure now appeared on the left shoulder.
Eva illuminated it first with the red and then with the white electric
torch, but the image, in which I distinctly perceived a male bearded
face, with a high forehead, would not suffer the light, and
disappeared behind the back of Eva's chair towards the back of the
cabinet, without Eva having changed the position of her hands. Since I
had closely followed the image from the shoulder, I did not let it go
out of sight, but rose and put my head deep into the cabinet, bending
over Eva as she sat quietly, and keeping the curtain closed under
my chin. In this way a ray of light passed over my head, through the
top of the curtain, on to the back of the cabinet, without disturbing
the medium. The male face then stood facing me like a male portrait in
life-size, fixed on the back wall, remained for about six seconds, and
then revolved about its own axis flat on the wall, the upper part of
the face falling down, and finally disappeared towards the floor
behind the medium's back. During this whole observation Eva's body was
motionless, and under my observation. The image was entirely separated
from her. Its motion and disappearance appeared to be under the
control of an unseen power".