These are riven by deep cracks, which emit hot sulphurous vapors.

The cave smelt strongly of hot sulphurous vapors.

The rocks in the neighborhood of these fountains are all corroded by the action of the sulphurous vapors.

At this distance, the suffocating, sulphurous vapors became so dense that I could follow the current no farther.

A stronger gust of the fitful wind filled the forest with the sulphurous vapors arising from the evaporating furnaces.

Flames and sulphurous vapors could hardly be actually present at Stabiae, ten miles from the centre of the eruption.

Here the earth is hot and cracked; in many places emitting smoke and sulphurous vapors, as if covering concealed fires.

The ground moved and rolled like the ocean waves, while large crevices opened in many places allowing smoke and sulphurous vapors to escape.

Sulphurous vapors filled the air and violent tremblings of the earth were constant.