Input (grade 12): In 1827 François de Larderel, a Frenchman, invented a way of extracting boric acid from the volcanic mud by using steam to heat cauldrons to separate the two.
Output (grade 12): In 1827 François de Larderel, a Frenchman, invented a way of extracting boric acid from the volcanic mud by using steam to heat forto separate the two.