Chronometry

Chronometry

The science of the measurement of time.

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Chronometry > Clock

act of parliament clock

Chronometry; Clock

A British act of parliament passed in 1797 levied a tax of five shillings per annum on all clocks and is said to have caused a decline in their manufacture. Rather than maintain a ...

30-hour train

Chronometry; Clock

The 30-hour train has one wheel and pinion fewer than the eight-day clock. In the common 30-hour longcase train, the motion wheels are driven directly from the great-wheel arbor. ...

Japanese hours

Chronometry; Clock

The Japanese system of dividing the day, which was similar to that used in Europe in the Middle Ages, continued in use until 1873. The daylight period, including a considerable ...

train

Chronometry; Clock

The series of gears and pinions that transfer power to the escapement.

transit instrument

Chronometry; Clock

A telescope mounted in horizontal bearings lying in an east-west direction, so that if the telescope is at right angles to its axle or arbor it will always lie in the meridian ...

travelling clock

Chronometry; Clock

A broad term for any clock made to be used when travelling. In the 17th century it usually took the form of an extremely large watch, but bracket clocks and even lantern clocks ...