1878.] On Space of Four Dimensions. 235 
of December, at 10.30 a.m. With these four cords I went to 
the neighbouring dwelling of one of my friends, who had 
offered to Mr. Henry Slade the hospitalities of his house, so 
as to place him exclusively at my own and my friend’s dis- 
position, and for the time withdrawing him from the public. 
The seance in question took place in my friends’ sitting-room 
immediately after my arrival. I myself selected one of the 
four sealed cords, and, in order never to lose sight of it before 
we sat down at the table, I hung it around my neck—the 
seal in front always within my sight. During the seance , as 
previously stated, I constantly kept the seal— remaining un- 
altered — -before me on the table. Mr. Slade’s hands remained 
all the time in sight ; with the left he often touched his fore- 
head, complaining of painful sensations. The portion of the 
string hanging down rested on my lap, — out of my sight, it 
is true,— but Mr. Slade’s hands always remained visible to 
me. I particularly noticed that Mr. Slade’s hands were not 
withdrawn or changed in position. He himself appeared to 
be perfectly passive, so that we cannot advance the assertion 
of his having tied those knots by his conscious will, but only 
that they, under these detailed circumstances, were formed 
in his presence without visible contadt, and in a room illu- 
minated by bright daylight. 
According to the reports so far published the above experi- 
ment seems also to have succeeded in Vienna in presence of 
Mr. Slade, although under less stringent conditions.* Those 
of my readers who wish for further information on other 
physical phenomena which have taken place in Mr. Slade’s 
presence, I refer to these two books. I reserve to later 
publication in my own treatises the description of further ex- 
periments obtained by me in twelve seances with Mr. Slade, 
and, as I am expressly authorised to mention, in the presence 
of my friends and colleagues, Prof. Fechner, Prof. Wilhelm 
Weber, the celebrated electrician from Gottingen, and Herr 
Scheibner, Professor of Mathematics in the University of 
Leipzig, who are perfectly convinced of the reality of the 
observed fadts, altogether excluding imposture or prestidigi- 
tation. 
At the end of my first treatise, already finished in manu- 
script in the course of August, 1877, I called attention to 
the circumstance that a certain number of physical pheno- 
mena, which, by “ synthetical conclusions a priori,” might 
* “ Mr. Slade’s Aufenshalt in Wien : Ein offener Brief an meine freunde.” 
Wien : I. C. Fischer, and Co., 1878. “ Der Individualismus im Lichte der 
Biologie und Philosophic der Gegenwart von Lazar B. Hellenbach.” Wien ; 
Braumuller, 1878. 
