8. Imprints of hands and naked feet on smoked surfaces or surfaces
powdered with flour, which did not correspond with the hands and feet
of the medium, who remained meantime in full view of the experimenters,
while Slade’s feet were covered with shoes.
9. Knots tied in bands of copper sealed at both ends and held in the
hands of Slade and Zoellner, etc.
We find the same tests and facts observed by Mr. Crookes and the French
experimenters, who, following his example, have sought to account for
_Psychic Force_.