At the age of 23, Giuseppe Seguenza discovered that all the products of the emanations of Vulcano (one of the Aeolian Islands) contained arsenic compounds.
Afterward, he published other scientific works that earned him the attention of scholars in Europe and the silver medal at the Paris Exposition.
There followed other work around the metalliferous deposits of Fiumedinisi, land and fossils of the territory of Messina, and Calabria, which were awarded and published at his own expense by the Royal Academy of the Lincei.
[2] A genus of sea snails, known as Seguenzia (family Seguenziidae), was named in his honor.
[4] One of the three science high schools in Messina, Liceo Scientifico G. Seguenza, is named after Giuseppe.