Giovanni Antonio Giobert

Giovanni Antonio Giobert, also known as Jean-Antoine Giobert, was an Italian chemist and mineralogist who studied magnetism, galvanism, and agricultural chemistry. He introduced Antoine Lavoisier's theories to Italy, and built a phosphorus-based eudiometer sufficiently sensitive to measure atmospheric carbon dioxide and oxygen. He identified the correct composition of the mineral Gioberite, a form of magnesite (MgCO3) found in the Piedmont area. He was made a knight (Cavaliere) for his work on the chemistry of indigo dyes.