contradictions, also, and if they could be reconciled by the idea of
a four-dimensional space our reason would accept this idea without
cavil. Furthermore, if from our childhood, phenomena had been of
daily occurrence requiring a space of four or more dimensions for an
explanation conformable to reason, we should feel ourselves native
to a space of four or more dimensions.

Poincaré, the great French mathematician and physicist, arrived at
these same conclusions by another route. By a process of
mathematical reasoning of a sort too technical to be appropriately
given here, he discovers an order in which our categories range
themselves naturally, and which corresponds with the points of space;
and that this order presents itself in the form of what he calls a
"three circuit distribution board." "Thus the characteristic property
of space," he says, "that of having three dimensions, is only a
property of our distribution board, _a property residing, so to speak,
in human intelligence_." He concludes that a different association
of ideas would result in a different distribution board, and that
might be sufficient to endow space with a fourth dimension. He
concedes that there may be thinking beings, living in our world,
whose distribution board has four dimensions, and who do
consequently think in hyperspace.


THE NEED OF AN ENLARGED SPACE-CONCEPT

It is the contrariety in phenomena already referred to, that is
forcing advanced minds to entertain the idea of higher space.
Mathematical physicists have found that experimental contradictions
disappear if, instead of referring phenomena to a set of three space