The Oculus Table introduces a contemporary twist to a common ancient Greek sundial, the scaphe (σκάφη or "bowl"). With sunlight streaming through the oculus—the hole in the ceiling of the Observatory—the movable table can be visually aligned with landmarks on the skyline (Coit Tower, Transamerica Pyramid, etc.) to discover the sun's position in the sky and the current time and date.
Rebecca Cummins, 2000
A twenty-foot-long wall of approximately 900 water-filled wine glasses became optical devices turning the world upside down.
04/16/2013 to 01/09/2016
The Solar Hour Benches are a set of six oval benches, each with a slit aperture aligned with the sun for one particular hour: 10 a.m., 11 a.m., Noon, 1 p.m., 2 p.m. or 3 p.m. solar time. Throughout the year, for only twenty minutes before and after the corresponding hour, sunlight travels through the aperture and projects onto inscriptions on the ground. Scientific and cultural aspects of time and sundials are also depicted on each bench.