That's how the temperature was kept up.

In sufficient quantity it is practically indestructible, you see.

My word! this old gentleman knew a thing or two." Again we waited a little while to see if the body begun to crumble on exposure to the air, I taking the opportunity to make a rough sketch of it in my pocket-book in anticipation of that event.

But it did not; it remained quite sound.
"Here goes," said Bickley.

"If he should be alive, he will catch cold in his lungs after lying for ages in that baby incubator, as I suppose he has done.