He watched the clouds boiling above the mountains, spinning in the hot updrafts of air from the lower hills.

But more important than these, he watched the mirage, how it danced and boiled above the earth and tilted with the wind.

Lightning flashed from it, lancing upward into the clouds that were boiling angrily above them.

Not only less toxic, also boils far higher, well above the melting point of any glass.

The Grim began to boil almost directly above the quest.

Fog seemed to boil above the little waves, a scene from Bogotana's fiery depths.

Low dark clouds seemed to boil just above the roofs.

In an evacuated pipe, water will boil just slightly above its melting point (0 C).

But no blast of flame boiled the sea above his head.

The bearded man was too concerned with the bottle that boiled above the Bunsen burner.