Explorers Into Infinity

Through an instrument called the myrdoscope, Brett Gryce sees a girl in a distant world, menaced by a giant. Her world is so vast that a second of Time there takes whole years of Earthly measure. During three years he catches glimpses of the girl and her peril, the giant about to bring down a huge tree on her head, and the girt awakening to a sense of terror, but all this has taken but a second of Time on that vaster world. Brett and Martt Gryce set out to rescue the girl. In a space-ship invented by their father, Dr. Gryce, which can change its position in Time and Space. They increase their size to fifty million times what it was on Earth, and penetrate beyond our universe faster than the speed of light, until they are lost in the black immensity of Space.