Chronometry
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Chronometry, or horology, is the science studying the measurement of time and timekeeping. Chronometry enables the establishment of standard measurements of time, which have applications in a broad ra
The hourglass is often used as a symbol representing the passage of time.
Clocks; a watch-maker seated at his workbench
Chronos, the Greeks' personification of time
Ancient Egyptian sundial splitting daytime into 12 parts
Clock
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A clock or chronometer is a device that measures and displays time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units such a
Chronometry
…dating of geological material (geochronometry). Horology is commonly used specifically in reference to the mechanical instruments created to keep time: clocks, watches, clockwork, sundials, hourglasses, clepsydras, timers, time recorders, marine chronometers, and atomic clocks are all examples of instruments…
An analog pendulum clock made around 18th century
Casio F-91W digital watch, a historically popular watch introduced in 1989
Simple horizontal sundial
The flow of sand in an hourglass can be used to keep track of elapsed time.