Adventures in the Far Future & Tales of Outer Space — page 253: what you’re looking at

Machine-transcribed from the original scan — historical spelling and the odd misread are preserved.

Curt shivered as he thought of the sopacemen who had walked into just such warps in the early days. Daring mariners of soace who had ventured to land their ships on the Sunward side, had dared to take short excursions tn their old-type space suit. Most of them had died, blasted by the radiations spewed out by the Sun, literally cooked to death. Others had walked across the plain and disappeared. They had walked into the warps and disappeared as if they had melted into thin air. Although, of course, there wasn't any air to melt into—hadn't been for many million years. On this world, all free elements long ago had disappeared. Those elements that remained, except possibly far underground, were locked so stubbornly in combination that it was impossible to blast them free in any appreciable quantity. That was why liquid air was carted clear from Venus. The tracks in the dust and rubble made by Knut’s machine were plainly visible, and Craig followed them. The Jumper topped a slight rise and dipped into a_ slight depression. And in the center of the depression was a queer shifting of light and dark, as if one were looking into a tricky mirror. That was the space warp! Craig glanced at the instruments and caught his breath. Here was a space warp that was really big. Still following the tracks of Knut’s machine, he crept down into the hollow, Swinging closer and closer to that shifting, almost invisible blotch that marked the warp. Here Knut’s machine had stopped, and here Knut had gotten out to carry the instruments nearer, the blotchy tracks of his space suit like furrows through the powdered soil. And there he had come back ... and stopped and gone forward again. And there— CORniclooo SS CO