This temperature is caused, let us say, by the vibration of every tiny particle with which the band is composed. Thus, at every point along the band, the vibration of its particles would be just a little different from every other point. * * * * * Conceive, now, a material body--your body, for instance. Every tiny particle of which it is constructed, is vibrating. I mean no simple vibration. Do not picture the physical swing of a pendulum. Rather, the intricate total of all the movements of every tiny electron of which your body is built. Remember, in the last analysis, your body is merely movement--vibration--a vortex of Nothingness. You have, then, a certain vibratory factor. You take your place then upon the Time-scroll at a point where your inherent vibratory factor is compatible with the scroll. You are in tune; in tune as a radio receiver tunes in with etheric waves to make them audible. Or, to keep the heat analogy, it is as though the scroll, at the point where the temperature is 70 deg.F, will tolerate nothing upon it save entities of that register. And so, at that point on the scroll, the myriad things, in myriad positions which make up the Cosmos, lie quiescent. But their existence is only instantaneous. They have no duration. At once, they are blotted out and re-exist. But now they have changed their vibratory combinations. They exist a trifle differently--and the Time-scroll passes them along to the new position. On a motion picture film you would call it the next frame, or still picture. In radio you would say it has a trifle different tuning. Thus we have a pseudo-movement--Events. And we say that Time--the Time-scroll--keeps them separate. It is we who change--who seem to move, shoved along so that always we are compatible with Time. * * * * * And thus is Time-traveling possible. With a realization of what I have here summarized, Harl and the cripple Tugh made an exhaustive study of the vibratory factors by which Matter is built up into form, and seeming solidity. They found what might be termed the Basic Vibratory Factor--the sum of all the myriad tiny movements. They found this Basic Factor identical for all the material bodies when judged simultaneously. But, every instant, the Factor was slightly changed. This was the natural change, moving us a little upon the Time-scroll. They delved deeper, until, with all the scientific knowledge of their age, they were able with complicated electronic currents to alter the Basic Vibratory Factors; to tune, let us say, a fragment or something to a different etheric wave-length. They did that with a small material particle--a cube of metal. It became wholly incompatible with its _Present_ place on the Time-scroll, and whisked away to another place where it was compatible. To Harl and Tugh, it vanished. Into their Past, or their Future: they did not know which.