around heah!" muttered Eradicate Sampson. "Dat box am knocked clean
into nuffiness, Massa Tom."

"That's what I wanted to do," explained the lad. "And I guess this
will end the test for tonight."

"But I don't exactly understand it," spoke Ned, as they all moved
toward the Swift home, Eradicate going to the stable to see how his
mule was. "Do you have two kinds of bullets, Tom, one for night and
one for the daytime?"

"No," answered Tom, "there is only one kind of bullet, and, as I
have said, that isn't a bullet at all. That is, you can't see it, or
handle it, but you can feel it. Strictly speaking, it is a
concentrated discharge of wireless electricity directed against a
certain object. You can't see it any more than you can see a
lightning bolt, though that is sometimes visible as a ball of fire.
My electric rifle bullets are similar to a discharge of lightning,
except that they are invisible."

"But we saw the one just now," objected Ned.

"No, you didn't see the bullet," said Tom.

"You saw the illuminating flash which I send out just before I fire,
to reveal the object I am to hit. That is another part of my rifle
and is only used at night."

"You see I shoot out a ball of electrical fire which will disclose
the target, or the enemy at whom I am firing. As soon as that is