iar with the operation of this
mechanism as you are with the operation of one of your Earthly
automobiles. The first is that a similar control is to be installed in
your new space-vessel, since by its use you can attain a perfection of
handling impossible by any other system. The second, and more important
reason, is that neither I nor any other man of Norlamin could compel
himself, by any force of will, to direct a ray that would take away the
life of any fellow-man."

While Rovol was speaking, he reversed his rays, and soon the component
parts of the new control had been disassembled and piled in orderly
array about the room.

"Hm--m--m. Never thought of that. It's right too," mused Seaton. "How're
you going to get it into my thick skull--with an educator?"

"Exactly," and Rovol sent a beam of force after his highly developed
educational mechanism. Dials and electrodes were adjusted, connections
were established, and the beams and pencils of force began to
reconstruct the great central controlling device. But this time, instead
of being merely a bewildered spectator, Seaton was an active participant
in the work. As each key and meter was wrought and mounted, there were
indelibly impressed upon his brain the exact reason for and function of
the part, and later, when the control itself was finished and the
seemingly interminable task of connecting it up to the output
force-bands of the transformers had begun, he had a complete
understanding of everything with which he was working, and understood
all the means by which the ends he had so long desired were to be
attained. For to the ancient scientist the tasks he was then performing
were the merest routine, to be performed in reflex fashion, and he
devoted most of his attention to transferring from his own brain to that
of his young assistant as much of his stupendous knowledge as the
smaller brain of the Terrestrial was capable of absorbing. More and more
rapidly as the work progressed the mighty flood of knowledge poured into
Seaton's mind. After an hour or so, when enough connections had been
made so that automatic forces could be so directed as to finish the job,
Rovol and Seaton left the laboratory and went into the living room. As
they walked, the educator accompanied them, borne upon its beam of
force.

"Your brain is behaving very nicely indeed," said Rovol, "much better
than I would have thought possible from its size. In fact, it may be
possible for me to t