Rolf looked at her and frowned. “Why put it so near the Station?” he asked. “Aren’t you running the risk of its being damaged if your experiment proves successful, _vinral?_” Lynne said patiently, “What does Mars need most, and where does Mars need it most? The answers are rain and at Woomera Station. Since there are no hills on Mars, there’s no danger of a flash flood. And if it rains too much, we turn our gadget off. Simple?” “No,” said Rolf with a slow smile. “It’s _farbishly_ complex. But I’ll fly to New Samarkand tonight and see what can be done about getting official permission. In the meantime, Lynne, you and Revere and Rana start getting the machinery set up. You have the full resources of the depot at your disposal.” The next morning, Lynne, Revere, Rana and a volunteer crew of Nampura Depot experts were busily installing the relay circuits Lynne had devised in a block of non-metallic instant-concrete on the far side of a gentle rise some twenty kilometers from E area, northwest of Woomera Station. Rolf had flashed her message that, though they had as yet no official okay, he had won them sub-rosa permission from Agriculture boss Radchev and other interested authorities to go ahead. Rolf had promised to be there within the hour, when they set the switch that would prove their mastery of E or the reverse. Lynne had to fight hard to maintain a semblance of assurance as the zero hour approached. She was checking the relays for the irritant playback for the forty-ninth time when a government planetplane, with its blue body and bright red disc markings, circled above them and came in to a smooth landing. When Rolf appeared, followed by Radchev and other high brass, she directed toward him a thought of relief. Once again, before pressing the switch that would put the new E project into work, she was forced to explain its theory. Weather, a tall human skeleton named Krausemeier, was frankly worried. He said, “What if it works and this artificial storm of yours wipes out the moisture in the atmosphere?” “It can’t, and you know it,” Lynne replied promptly and was aghast at her own temerity. “There isn’t enough air around Mars right now to create a drizzle--so how can a rainstorm lessen it? It’s got to _add_ to the moisture if it works at all.” Shaking his head, Weather subsided. There were other arguments and discussions and final check-ups against anything going wrong with the relay. When, at 1131 Mars Time, Lynne pressed the button from the control station, two kilometers away from the power plant, it was almost an anti-climax.