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Sundial - Wikipedia The Tower of the Winds in Athens included both a sundial and a water clock for telling time A canonical sundial is one that indicates the canonical hours of liturgical acts, and these were used from the 7th to the 14th centuries by religious orders
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Sundial | Definition, History, Types, Facts | Britannica Sundial, the earliest type of timekeeping device, which indicates the time of day by the position of the shadow of some object exposed to the sun’s rays As the day progresses, the sun moves across the sky, causing the shadow of the object to move and indicating the passage of time
Sundial S - NASS Volunteers from the Analemma Society and NASS demonstrated a number of sundial types and provided paper sundial cut-outs that were enjoyed by children, students, parents and teachers alike
EAAE - How does a sundial work? A sundial is a device that measures time by the position of the Sun In common designs such as the horizontal sundial, the Sun casts a shadow from the gnomon, which is a thin rod straight edge, onto a flat surface marked with lines indicating the hours of the day
History of sundials - Wikipedia After the invention of the clock, the sundial maintained its importance, as clocks needed to be reset regularly from a sundial, because the accuracy of early clocks was poor A clock and a sundial were used together to measure longitude Dials were laid out using straightedges and compasses