SPACE, in geometry, the room in which an object, actual or imaginary, ex ists. All material objects possess length, breadth, and thickness; in other words, they exist in space of three dimensions. Plane surfaces have only two dimensions —length and breadth, and straight lines but one dimension—length. Hence we have notions of space of one dimension and of two dimensions, as distinguished from the three dimensional space in which we live. The question has arisen, and has been warmly discussed, as to whether space of four, and perhaps of higher dimensions exists. Ziiliner be lieves that it does, and that some persons have some of the power of be ings living in space of four dimensions, and thus accounts for many of the phe nomena of Spiritualism. For example, while a being living in space of two di mensions could only get in or out of a square by passing through one of its sides, a human being could enter the square from above; so, he argues, a per son having the properties of a four-di mensional being could enter or leave a closed box or room on its fourth-dimen sional side. In metaphysics, a conjugate
of material existence. Empirical philos ophers maintain that notions of space are derived from our knowledge of ex istence; transcendentalists that these no tions are innate.
In music, one of the four intervals be tween the five lines of a staff. They take their names from the notes which oc cupy them; thus, the spaces of the treble staff, counting upward, are F, A, C, and E, and of the bass, A, C, E, and G.
In physics, the room in which the Cos mos or universe exists.
In printing, the interval between words in printed matter; also pieces of type-metal shorter than type, used to produce such spaces or to separate let ters in words, of varying thickness, so as to justify the line.