the fleet. Behind them came a
somewhat smaller ring of light cruisers, then rings of heavy cruisers
and of light battleships, and finally of heavy battleships. At the apex
of the cone, protected by all the other vessels of the formation and in
best position to direct the battle, was the flagship. In this formation
every vessel was free to use her every weapon, with a minimum of danger
to her sister ships; and yet, when the gigantic main projectors were
operated along the axis of the formation, from the entire vast circle of
the cone's mouth there flamed a cylindrical field of force of such
intolerable intensity that in it no conceivable substance could endure
for a moment!

The artificial planet of metal was now close enough so that it was
visible to the ultra-vision of the Secret Service men, so plainly
visible that the warships of the pirates were seen issuing from the
enormous air-locks. As each vessel shot out into space it sped straight
for the approaching fleet without waiting to go into any formation--gray
Roger believed his structures invisible to Triplanetary eyes, thought
that the presence of the fleet was the result of mathematical
calculations, and was convinced that his mighty vessels of the void
would destroy even that vast fleet without themselves becoming known. He
was wrong. The foremost globes were allowed actually to enter the mouth
of that conical trap before an offensive move was made. Then the
vice-admiral in command of the fleet touched a button, and
simultaneously every generator in every Triplanetary vessel burst into
furious activity. Instantly the hollow volume of the immense cone became
a coruscating hell of resistless energy, an inferno which, with the
velocity of light, extended itself into a far-reaching cylinder of
rapacious destruction. Ether-waves they were, it is true, but vibrations
driven with such fierce intensity that the screens of deflection
surrounding the pirate vessels could not handle even a fraction of their
awful power. Invisibility lost, their defensive screens flared briefly;
but even the enormous force backing Roger's inventions, greater far than
that of any single Triplanetary vessel, could not hold off the
incredible violence of the massed attack of the hundreds of mighty
vessels composing the Fleet. Their defensive screens flared briefly,
then went down; their great spherical hulls first glowing red, then
shining white, then in a brief moment exploding into flying ma