But enough of that. Here is a hopeful thought for the time-travelers. There is nothing in physics or chemistry to prevent you from going into the past or future--at least, the future--and shaking hands with yourself or killing yourself. We will eliminate the past, for it seems that it cannot be altered physically. But take the future: not so very far from to-day the matter of your body will have been totally replaced by new matter; the old will disappear in waste. Physically, you will be a new man, and physically the matter of to-day may destroy that of to-morrow and return in itself unaltered. But none-the-less there will be some limiting interval during which "you" have not been entirely transformed to new matter, so that an atom would have to be in two places at once. Maybe time-traveling progresses in little jumps like emission of light. And maybe an atom can be in two places at once. If you are going to treat time as just another dimension, there seems to be no reason why an object which can be in one place at two times cannot be at one time in two places. This is all physics. The paradoxes of time-traveling arise more particularly from its effect on what we call consciousness, the something that makes me "me"--an individual. We can imagine an atom in two places at once, but not a soul, if you will. This will not bother the materialist who considers a living creature merely a machine, but it will most of us. So I must be content with offering a materialistic possibility of traveling in time. The Science Correspondence Club wishes to extend its invitation to all Readers in other nations to join with all privileges save that of holding office. The latter may later be changed as our international membership increases. We have laboratory branches here, and we want them abroad in addition to scattered members. Then, it will be necessary to have a governing body and director in every country. At present all matters pertaining to foreign membership pass through my hands and I will do my best to supply information to all who seek it. We will also be glad to hear of the work and plans of other similar organizations in other countries, as we are doing with the German Verein für Raumschauffert. Address all inquiries to me at 302 So. Ten Broeck St., Scotia, New York, U. S. A.--P. Schuyler Miller, Foreign Director, S. C. C. "_A Wow!_" Dear Editor: Astounding Stories magazine is a wow! I can hardly wait until next month for the April issue. "The Phalanxes of Atlans," "Beyond the Vanishing Point" and "The Pirate Planet" are perfect. Every time I start a story I never stop till it's finished. I hope that there will appear even better stories in later issues.