(17) Velocity is, in (17) Velocity is, in (17) The magnitude equal spaces, in equal times, in of the motion, the inverse proportion direct proportion to velocity being to the time. the space. equal, is in direct geometrical proportion to the matter (mass). (18) Time is not (18) Space is (18) Matter as such measurable directly measurable directly (mass) is through itself, but through itself, and measurable, _i.e._, only indirectly indirectly through determinable as through motion, motion, which is in regards its quantity which is in space time and space only indirectly, and time together: together; hence, for only through the thus the motion of example, an hour’s amount of the motion the sun and of the journey, and the which it receives clock measure time. distance of the and imparts when it fixed stars is repelled or expressed as the attracted. travelling of light for so many years. (19) Time is (19) Space is (19) Matter is omnipresent. Every eternal. Every part absolute. That is, part of time is of it exists always. it neither comes everywhere, _i.e._, into being nor in all space, at passes away, and once. thus its quantity can neither be increased nor diminished. (20) In time taken (20) In space taken (20, 21) Matter by itself everything by itself everything unites the ceaseless would be in would be flight of time with succession. simultaneous. the rigid immobility of space; therefore it is the permanent substance of the changing accidents. Causality determines this change for every place at every time, and thereby combines time and space, and constitutes the whole nature of matter. (21) Time makes the (21) Space makes the