Works of "Research Collection"
Place Collected: 1872 eruption
Place Collected: on Mt. Etna
Place Collected: 1882 eruption
Place Collected: Traversella
Place Collected: 1911 eruption
Place Collected: Gamba Hill
Place Collected: Mt. Vesuvius
Place Collected: 1872 eruption
Place Collected: 1850 eruption
Place Collected: Albani Hills