two 50′ x 45′ low-relief polished marble mosaics by the swiss-born artist herman volz are located in the south portico of san francisco city college's science hall, located on ocean campus. the murals are named "organic and inorganic science". the imagery of the mosaics represent fields such as physics, chemistry, biology, and mathematics with text accompanying the mural that reads ‘"give me a base and i move the world."’ these murals were originally part of the golden gate international exposition’s "art in action" show in 1940 on treasure island before they were moved to the college. the two mosaics took two years to install with a staff of eight workmen, juan breda served as assistant mosaicist for the project. the murals were restored in 2005.