“Any one may doubt all I have said until I prove its truth,” he went on. “But certainly every one will admit that if it were possible for us in one hour to make a journey of five billion miles from a star of the twelfth magnitude to our earth, and were our eyes strengthened as I have mentioned, we could, in as short a time, view scenes from the whole of mankind’s history, beginning with the first man down to this very moment. This, too, every one will admit: that if the traveller desired to view a scene longer, he would have to fly with the same velocity and in the same direction as light does. Now, if we should soar up from this hall and fly with the velocity of light, we would see continually the very scene that is now before our eyes. But if we should suddenly be transferred to a point distant a little over 3,225,000,000 miles from the earth, and should then speed on with the velocity of light, the earth would appear to us as it looked twenty-four hours ago. If we should then suddenly advance ten, a hundred, or a thousand times as far, we should see what had happened on earth ten, a hundred, or a thousand days ago, and so on. The course of our flight of course would not be direct or arbitrary; it would be a gigantic cycloid, so as to follow not only the earth’s rotation around its axis, but also its course around the sun. Of all the scenes that have taken place on the face of the globe, not a single one has been lost, but images of all are being preserved in the great mirror of the universe. By means of enormous speed all these images may be traced, looked at, and examined at will. I have invented the instruments necessary for this journey, and although they may surprise everybody by their unparalleled simplicity, they have been so often successfully tested that I can to-night invite any one of the company to undertake with me an expedition into the universe.”
Loud laughter, expressive partly of distrust, partly of ridicule, shook the hall. “A Utopian scheme! A hypothesis! Non-sense!” Such and similar cries came from various parts of the room. After the laughter had somewhat subsided, the same grumbler in the rear who had interrupted my friend shortly before remarked,—
