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Fourth Dimension of Space

There are three known dimensions in space typified in the three geometric figures-a line, having length, a surface, length and breadth, a cube, length, breadth and thickness. It has been conjectured that a fourth dimension may exist in addition to length, breadth, and thickness. Spiritualists have claimed to find proof of a fourth dimension in certain of the physical phenomena of the séance-room such as the tying of knots in endless cords, and the passage of matter through matter. Fowler, Miss Lottie: (See Spiritualism.)