Ray Cummings & Murray Leinster 
Astounding Science Fiction – Volume I [EPUB ebook] 

What are "astounding" stories?
Well, if you lived in Europe in 1490, and someone told you the earth was round and moved around the sun—that would have been an "astounding" story. Or if you lived in 1840, and were told that some day men a thousand miles apart would be able to talk to each other through a little wire—or without any wire at all—that would have been another. Or if, in 1900, they predicted ocean-crossing airplanes and submarines, world-girdling Zeppelins, sixty-story buildings, radio, metal that can be made to resist gravity and float in the air—these would have been other "astounding" stories. To-day, time has gone by, and all these things are commonplace. That is the only real difference between the astounding and the commonplace—Time. To-morrow, more astounding things are going to happen. Your children—or their children—are going to take a trip to the moon. They will be able to render themselves invisible—a problem that has already been partly solved. They will be able to disintegrate their bodies in New York and reintegrate them in China—and in a matter of seconds. Astounding? Indeed, yes…