all the credit for the result of
their years of work together!

And always, in the back of his mind, there was a vision of the little
Government ticket in Ruth's hand, with the numbers in staring black
type. They had burned into his brain. He could never forget them.
Often at night, after a hard day's work, he would suddenly awaken out
of a hideous nightmare, in which he saw Ruth taken away by the agents
of the Government, to be thrown as a sacrifice to the monsters.

And Cliff was hiding something! That made the situation unbearable.

The coolness between the two men was rapidly changing into open
animosity. And then one day, quite by chance, in Cliff's absence, Kay
came upon evidence of Cliff's activities.

Cliff was no longer experimenting with the W-ray! He was using a new
type of ray altogether, the next series, the psenium electron
emanation discovered only a few years before, which had the peculiar
property of non-alternation, even when the psenium electron changed
its orbit around the central nucleus of the psenium atom.

Instead of discontinuity, the psenium electron had been found to emit
radiation steadily, and this had upset the classic theories of matter
for the ninth time in the past fifteen years.

* * * * *

And Kay's wrath broke loose in a storm of reproaches when Cliff came
into the laboratory.

"You've been deliberately keeping me in the dark!" he shouted. "You're
a nice sort of partner to have! Here's where we split up the
combination, Hynes!"

"I've been thinking that for a long time," sneered Cliff. "The fact
is, Kay, you're a little too elementary in your ideas to suit me. It's
due to you that I kept hammering away on the wrong tack for years. The
sooner we part, the better."

"No time like now," said Kay. "Keep your laboratory. You put most of
the money into it, anyway. I'll build me another--where I can work
without being hampered by a partner who's out for himself all the
time. Good luck to you in your researches, and I hope you'll get all
the credit when you find a way of annihilating the Earth Giants."

And he stormed out of the laboratory, jumped into his plane, and
winged his way southward toward his apartment in New York.

* * * * *

Crowds in the streets of every town on the way. In villages and
hamlets, swarming like ants, and hurrying along the highways! Kay, who
flew one of the slow, old-fashioned planes, ave