clocks indicate. Roughly, I should say that the planet's diameter,
at the place where I saw the clock, is fifty per cent greater than
at the point where Van's agent is located; maybe ten thousand miles
in its greatest diameter, Capellette.

"Having greater gravitation would explain why that disabled aircraft
which Smith saw fell so very slowly; the planet has much more air
than the earth, which means far greater density near the surface. It
also explains those big sailing cruisers; nothing else can.

"At any rate, we can guess why we have seen no surface travel. The
people of Capellette never tried to work out such a thing as an
automobile; why should they, with the birds to imitate, and extra
dense air all about them?

"I think we have found the key." The doctor cogitated for a second
or two.

"However, let's consider that schoolroom a bit. It was in no way
different from what you will find on the earth right now. Why?"

Smith had a notion. "There is such a thing as perfection. Like some
electrical apparatus; you simply can't improve them."

"Sounds reasonable," from Van Emmon.

"Yes. And that is undoubtedly how the Capellettes look at the
matter.

"Why haven't they got talking-pictures? Because they've perfected