"That's a thought. Our solar beam uses an incandescent dynode." Channing removed the second coil and handed it to Freddy. "Take this thing down to the metallurgical lab and tell 'em to analyze it right down to the trace of sodium that seems to be in everything. I want quantitative figures on every element in it. Also, cut off a hunk and see if the crystallographic expert can detect anything peculiar, that would make this hunk of copper wire different from any other hunk. Follow?" "Yup," said Freddy. "We'll also start making similar alloys with a few percent variation on the composition metals. Right?" "That's the ticket. Wes, can we evacuate a tube with this wire in it and make it incandescent?" "Let's evacuate the room. I like that stunt." "You're the engineer on this trick. Do it your way." "Thanks. I get the program, all right. Why not have Charley build us a modulator for the driver tube? Then when we get this thing perfected, we'll have some way to test it." "Can do, Charley?" "I think so. It's easy. We'll just modulate the cathode current of the electron guns that bombard the big cathode. That is the way we adjust for drive; it should work as a means of amplitude-modulation." "O.K.," said Channing. "We're on the rails for this one. We'll get together as soon as our various laboratories have their answers and have something further to work with." * * * * * Above Venus, Mark Kingman was listening to the wailing roar of alien symphony and cursing because he could hardly hear the voice of his Lunar accomplice saying: "V. E. Preferred just hit one hundred and two!" Fifteen minutes before the peak hit Northern Landing, share after share was being dumped, and in addition, a message was on its way back to Terra. It went on the regular beam transmission through Venus Equilateral, carefully coded. It said: "Have sufficient stock and additional collateral to ply the first pressure. Apply phase two of plan. Kingman." In the ten hours that followed, Venus Equilateral stock went down and down and down, passed through a deep valley, and started up again. Up it went. Up past the one hundred mark, up into the one hundred and fifties. It hovered there for a bit, and then started up again. Kingman's crowd was offering twice the market for the preferred stock, and there was little to have. It took a short-time dip at three hundred, and the few minutes of decline smoked a lot of stock out of the hands of people who looked upon this chance as the right time to make their money and get out. Then the stock began to climb again, and those people who thought that the price had been at its peak-and-passed were angrily trying to buy in again. That accelerated the climb, but Kingman's crowd, operating on Venus and on Mars and on Terra were buying only, and selling not one share of Interplanetary Communications.