A swift check revealed one fact. The machines, when trained on the Jovian worlds, refused to function. Anywhere else in space, however, they worked perfectly.
Russ stoked and lit his pipe, snapped off his machine and swung around in the operator's chair.
"Somebody's playing hell with us out around Jupiter," he stated calmly.
"I've been expecting something like this," said Greg. "I have been afraid of this ever since Craven blanketed us out of the Interplanetary building."
"He really must have something this time," Russ agreed. "He's blanketing out the entire Jovian system. There's a space field of low intensity surrounding all of Jupiter, enclosing all the moons. He keeps shifting the intensity so that, even though we can force our way through his field, the irregular variations make i
