A third one lies about four or five feet deep, in a rather broad basin, and produces only a few little bubbles.

But this calmness is deceptive: it seldom lasts more than half a minute, rarely two or three minutes; then the spring begins to bubble, to boil, and to wave and spout to a height of two or three feet; without, however, reaching the level of the basin.

In some springs I heard boiling and foaming like a gentle bellowing; but saw no water, sometimes not even steam, rising.
Two of the most remarkable springs which can perhaps be found in the world are situated immediately above the Geyser, in two openings, which are separated by a wall of rock scarcely a foot wide.

This partition does not rise above the surface of the soil, but descends into the earth; the water boils slowly, and has an equable, moderate discharge.

The beauty of these springs consists in their remarkable transparency.