Hourglass

An hourglass, or sand timer, is used to measure a set period of time by the flow of sand from one chamber to the other through a narrow gap.

Size: 4121px × 3076px
Photo credit: © Photo Researchers / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: background, blue, clock, comparison, hourglass, instrument, keeper, measure, measurement, sand, sandtimer, sequence, shot, studio, time, timer, watch