Chronometry

Chronometry

The science of the measurement of time.

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Chronometry > Clock

orrery

Chronometry; Clock

This term is usually applied to a small-scale three-dimensional representation of the movements of the heavenly bodies of the solar system, the Earth, moon, planets and their ...

orpheus clock

Chronometry; Clock

A group of nine mid 16th-century table clocks bear decoration in the form of Orpheus charming the beasts with music, and Eurydice and Cerberus at the entrance to Hades. The cases ...

ormolu

Chronometry; Clock

Ornamental metalwork made from cast bronze, worked and chased before being gilded. It originated in France in the 17th century for decorating cabinetwork and the cases of clocks.

organ clock

Chronometry; Clock

An unusual form of clock in which the chiming of the hour is preceded or replaced by a short tune played on a miniature pipe organ. The sound made by these clocks is comparable to ...

open escapement

Chronometry; Clock

The wheel and pallet movement that can be seen on some clock dials.

oilstone

Chronometry; Clock

An abrasive stone such as Arkansas, India or Turkey, used with a lubricant for sharpening tools to a fine edge. Fine oil is normally used. Oilstones can be obtained in grades such ...

oil sink

Chronometry; Clock

The depression surrounding a pivot hole. Early in the 18th century, Henry Sully discovered that a small basin around the pivot hole reduced the tendency for oil to spread across ...