For such natural steam-holes, the French geologists often use the term " soufflards " in place of the Italian " soffioni ".
2.
In 1777, boric acid was recognized in the hot springs ( soffioni ) near Florence, Italy, and became known as " sal sedativum ", with primarily medical uses.
3.
The soffioni are usually arranged in groups, and are best represented in the Maremma of Tuscany, where they contain a small proportion of boric acid, for which they are utilized industrially.
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