This is the "sulphur showers" we hear of.
Barren Island was last in eruption in 1803, but there is still a thin column of steam from a sulphur bed at the top and a variable hot spring at the point where the last outburst of lava flowed into the sea.
Knit goods are manufactured, but the importance of the place is due to its sulphur springs, the waters of which are used for the treatment of skin diseases, gout, rheumatism, etc., and to the tonic air and fine scenery.
The Trinity--the three elements of matter--are sulphur, mercury, and salt.
On the shore below is the little village of Sermione, with sulphur baths.
