about physics, light, force, energy, vibration. We have got to
know."

"Your theory?"

"It still holds good."

I thought.

"Let me get it clear, Hobart. You say that we catch only certain
vibrations."

"That's it. Our eyes are instruments, nothing else. We can see
light, but we cannot hear it. We hear sound, but we cannot see it.
Of course they are not exactly parallel. But it serves the point.
Let's go a bit further. The eye picks up certain vibrations. Light
is nothing but energy vibrating at a tremendous speed. It has to
be just so high for the eye to pick it up. A great deal we do not
get. For instance, we can only catch one-twelfth of the solar
spectrum. Until recently we have believed only what we could see.
Science has pulled us out of the rut. It may pull us through the
Blind Spot."

"And beyond."

Hobart held up his hands.

"It is almost too much to believe. We have made a discovery. We
must watch our step. We must not lose. The work of Dr. Holcomb
shall not go for nothing."