"And just here let me say, Julian, as a most important point for you to remember in the history of the great Revolution, that it was not until the people had outgrown this childish teaching and saw the causes of the world's want and misery, not primarily in human depravity, but in the economic madness of the profit system on which private capitalism depended, that the Revolution began to go forward in earnest." Now, although the doctor had said that the school we were to visit was in Arlington, which I knew to be some distance out of the city, and that the examination would take place at ten o'clock, he continued to sit comfortably in his chair, though the time was five minutes of ten. "Is this Arlington the same town that was a suburb of the city in my time?" I presently ventured to inquire. "Certainly." "It was then ten or twelve miles from the city," I said. "It has not been moved, I assure you," said the doctor. "Then if not, and if the examination is to begin in five minutes, are we not likely to be late?" I mildly observed. "Oh, no," replied the doctor, "there are three or four minutes left yet." "Doctor," said I, "I have been introduced within the last few days to many new and speedy modes of locomotion, but I can't see how you are going to get me to Arlington from here in time for the examination that begins three minutes hence, unless you reduce me to an electrified solution, send me by wire, and have me precipitated back to my shape at the other end of the line; and even in that case I should suppose we had no time to waste." "We shouldn't have, certainly, if we were intending to go to Arlington even by that process. It did not occur to me that you would care to go, or we might just as well have started earlier. It is too bad!" "I did not care about visiting Arlington." I replied, "but I assumed that it would be rather necessary to do so if I were to attend an examination at that place. I see my mistake. I ought to have learned by this time not to take for granted that any of what we used to consider the laws of Nature are still in force." "The laws of Nature are all right," laughed the doctor. "But is it possible that Edith has not shown you the electroscope?" "What is that?" I asked. "It does for vision what the telephone does for hearing," replied the doctor, and, leading the way to the music room, he showed me the apparatus. "It is ten o'clock," he said, "and we have no time for explanations now. Take this chair and adjust the instrument as you see me do. Now!"