A time ball is a now obsolete time signalling device. It consists of a large, painted wooden or metal ball that is dropped at a predetermined time, principally to enable navigators to verify their marine chronometers from their ships offshore. Accurate timekeeping is one means by which longitude can be determined at sea.
Read more about Time Ball: History, Time Balls Around The World
Famous quotes containing the words time and/or ball:
“The earth is ready, the time is ripe, for the authoritative expression of the feminine as well as the masculine interpretation of that common social consensus which is slowly writing justice in the State and fraternity in the social order.”
—Anna Garlin Spencer (1851–1931)
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—Martin Goldsmith, and Edgar G. Ulmer. Vera (Ann Savage)