A round clock face with dash marks showing no time.

Blank Clock

A round clock face with dash marks showing no time.

A round clock face with numbers showing no time.

Blank Clock

A round clock face with numbers showing no time.

A round clock face with roman numerals showing no time.

Blank Clock

A round clock face with roman numerals showing no time.

"Diagrammatic drawing of a time-limit circuit breaker." —Croft 1920

Time-limit Circuit Breaker

"Diagrammatic drawing of a time-limit circuit breaker." —Croft 1920

An instrument or machine for measuring time.

Clock

An instrument or machine for measuring time.

An illustration of a Roman Numeral clock showing 2:50.

Clock 2:50

An illustration of a Roman Numeral clock showing 2:50.

An illustration of a Roman Numeral clock showing five o'clock (5:00).

Clock 5:00

An illustration of a Roman Numeral clock showing five o'clock (5:00).

An illustration of a Roman Numeral clock showing 7:30.

Clock 7:30

An illustration of a Roman Numeral clock showing 7:30.

"Waltham Lever Escapement. A device for the governing of speed is the one thing on which accurate time measuring depends." -Hill, 1921

Lever Escapement

"Waltham Lever Escapement. A device for the governing of speed is the one thing on which accurate time…

Gulliver's watch is being taken away. From <em>Gulliver's Travels</em> by Dean Swift.

Gulliver's Watch

Gulliver's watch is being taken away. From Gulliver's Travels by Dean Swift.

An instrument for measuring time, especially the interval of an hour, by the running of sand out of a glass vessel.

Hour-glass

An instrument for measuring time, especially the interval of an hour, by the running of sand out of…

A cartoon of an older man carrying a large hourglass in one hand, and a knapsack in the other hand.

Man Carrying Hourglass

A cartoon of an older man carrying a large hourglass in one hand, and a knapsack in the other hand.

An illustration of a section of the interior of a large house clock.

House Clock

An illustration of a section of the interior of a large house clock.

"The Knight and the Lady. By Albrecht D&uuml;rer. From the engraving on copper." -Heath, 1901

The Knight and the Lady

"The Knight and the Lady. By Albrecht Dürer. From the engraving on copper." -Heath, 1901

"Diagram illustrating one type of time-limit relay." &mdash;Croft 1920

Time-limit Relay

"Diagram illustrating one type of time-limit relay." —Croft 1920

"In marching in double time the saber is carried diagonally across the breast, edge to the front; the left hand steadies the scabbard." &mdash; Moss, 1914

Marching with saber

"In marching in double time the saber is carried diagonally across the breast, edge to the front; the…

"A form of Sun-dial that is as god to-day as any dial for determining noon." -Bodmer, 1917

Modern Sundial

"A form of Sun-dial that is as god to-day as any dial for determining noon." -Bodmer, 1917

The Tower of the Winds, also called horologion (timepiece), is an octagonal Pentelic marble clocktower on the Roman agora in Athens. The structure features a combination of sundials, a water clock and a wind vane. It was supposedly built by Andronicus of Cyrrhus around 50 BC, but according to other sources might have been constructed in the 2nd century BC before the rest of the forum.

Tower of the Winds

The Tower of the Winds, also called horologion (timepiece), is an octagonal Pentelic marble clocktower…

A watch with roman numerals.

Watch

A watch with roman numerals.

An illustration of a pocket watch.

Pocket Watch

An illustration of a pocket watch.

A pocket watch from Switzerland in 1907.

Swiss Pocket Watch

A pocket watch from Switzerland in 1907.