Horology (; related to

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power ...

'; ; ,

interfix In phonology, an interfix or (more commonly) linking element is a part of a word that is placed between two morphemes (such as two roots or a root and a suffix) and lacks a semantic meaning. Examples Formation of compound words In German, th ...

''-o-'', and suffix ''

-logy ''-logy'' is a suffix in the English language, used with words originally adapted from Ancient Greek ending in ('). The earliest English examples were anglicizations of the French '' -logie'', which was in turn inherited from the Latin '' -log ...

''), . is the study of the measurement of

time Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future. It is a component quantity of various measurements used to sequence events, t ...

Clock A clock or a timepiece is a device used to measure and indicate time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units such as the day, the lunar month and t ...

watches A watch is a portable timepiece intended to be carried or worn by a person. It is designed to keep a consistent movement despite the motions caused by the person's activities. A wristwatch is designed to be worn around the wrist, attached b ...

clockwork Clockwork refers to the inner workings of either mechanical devices called clocks and watches (where it is also called the movement) or other mechanisms that work similarly, using a series of gears driven by a spring or weight. A clockwork mec ...

sundial A sundial is a horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a fl ...

hourglass An hourglass (or sandglass, sand timer, sand clock or egg timer) is a device used to measure the passage of time. It comprises two glass bulbs connected vertically by a narrow neck that allows a regulated flow of a substance (historically sand) ...

es, clepsydras,

timer A timer is a specialized type of clock used for measuring specific time intervals. Timers can be categorized into two main types. The word "timer" is usually reserved for devices that counts down from a specified time interval, while devices th ...

time recorder A time clock, sometimes known as a clock card machine or punch clock or time recorder, is a device that records start and end times for hourly employees (or those on flexi-time) at a place of business. In mechanical time clocks, this was accompl ...

marine chronometer A marine chronometer is a precision timepiece that is carried on a ship and employed in the determination of the ship's position by celestial navigation. It is used to determine longitude by comparing Greenwich Mean Time (GMT), or in the mode ...

s, and

atomic clock An atomic clock is a clock that measures time by monitoring the resonant frequency of atoms. It is based on atoms having different energy levels. Electron states in an atom are associated with different energy levels, and in transitions betw ...

s are all examples of instruments used to measure

. In current usage, horology refers mainly to the study of mechanical time-keeping devices, while

chronometry Chronometry (from Greek χρόνος ''chronos'', "time" and μέτρον ''metron'', "measure") is the science of the measurement of time, or timekeeping. Chronometry provides a standard of measurement for time, and therefore serves as a signifi ...

more broadly includes electronic devices that have largely supplanted mechanical clocks for the best accuracy and precision in time-keeping. People interested in horology are called ''horologists''. That term is used both by people who deal professionally with timekeeping apparatuses (watchmakers, clockmakers), as well as

aficionados A fan or fanatic, sometimes also termed an aficionado or enthusiast, is a person who exhibits strong interest or admiration for something or somebody, such as a celebrity, a sport, a sports team, a genre, a politician, a book, a movie, ...

and scholars of horology. Horology and horologists have numerous organizations, both professional associations and more scholarly societies. The largest horological membership organisation globally is the NAWCC, the National Association of Watch and Clock Collectors, which is USA based, but also has local chapters elsewhere.

History

Museums and libraries

In Europe

There are many horology museums and several specialized libraries devoted to the subject. One example is the

Royal Greenwich Observatory The Royal Observatory, Greenwich (ROG; known as the Old Royal Observatory from 1957 to 1998, when the working Royal Greenwich Observatory, RGO, temporarily moved south from Greenwich to Herstmonceux) is an observatory situated on a hill in ...

, which is also the source of the

Prime Meridian A prime meridian is an arbitrary meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great ...

(

longitude Longitude (, ) is a geographic coordinate that specifies the east– west position of a point on the surface of the Earth, or another celestial body. It is an angular measurement, usually expressed in degrees and denoted by the Greek let ...

0° 0' 0"), and the home of the first marine timekeepers accurate enough to determine longitude (made by

John Harrison John Harrison ( – 24 March 1776) was a self-educated English carpenter and clockmaker who invented the marine chronometer, a long-sought-after device for solving the problem of calculating longitude while at sea. Harrison's solution revo ...

). Other horological museums in the London area include the

Clockmakers' Museum The Clockmakers’ Museum in London, England, is believed to be the oldest collection specifically of clocks and watches in the world. The collection belongs to and is administered by the Clockmakers’ Charity, affiliated to the Worshipful Com ...

, which re-opened at the Science Museum in October 2015, the horological collections at the

British Museum The British Museum is a public museum dedicated to human history, art and culture located in the Bloomsbury area of London. Its permanent collection of eight million works is among the largest and most comprehensive in existence. It docume ...

, the

Science Museum (London) The Science Museum is a major museum on Exhibition Road in South Kensington, London. It was founded in 1857 and is one of the city's major tourist attractions, attracting 3.3 million visitors annually in 2019. Like other publicly funde ...

, and the

Wallace Collection The Wallace Collection is a museum in London occupying Hertford House in Manchester Square, the former townhouse of the Seymour family, Marquesses of Hertford. It is named after Sir Richard Wallace, who built the extensive collection, along ...

. The

Guildhall Library The Guildhall Library is a public reference library specialising in subjects relevant to London. It is administered by the Corporation of London, the government of the City of London, which is the historical heart of London, England. The libra ...

London London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary dow ...

contains an extensive public collection on horology. In Upton, also in the United Kingdom, at the headquarters of the

British Horological Institute The British Horological Institute (BHI) is the representative body of the horological industry in the United Kingdom. It was founded by a group of clockmakers in 1858, and has its current premises at Upton Hall in Nottinghamshire, which inclu ...

, there is the Museum of Timekeeping. A more specialised museum of horology in the United Kingdom is the Cuckooland Museum in

Cheshire Cheshire ( ) is a ceremonial and historic county in North West England, bordered by Wales to the west, Merseyside and Greater Manchester to the north, Derbyshire to the east, and Staffordshire and Shropshire to the south. Cheshire's coun ...

, which hosts the world's largest collection of antique

cuckoo clock A cuckoo clock is, typically, a pendulum clock that strikes the hours with a sound like a common cuckoo call and has an automated cuckoo bird that moves with each note. Some move their wings and open and close their beaks while leaning forward ...

s. One of the more comprehensive museums dedicated to horology is the

Musée international d'horlogerie The International Museum of Horology, french: Musée international d'horlogerie, italic=no, is a horology, horological museum in La Chaux-de-Fonds, Switzerland. It is owned and operated by the city of La Chaux-de-Fonds. History In 1865 the Wat ...

, in

La Chaux-de-Fonds La Chaux-de-Fonds () is a Swiss city in the canton of Neuchâtel. It is located in the Jura mountains at an altitude of 1000 m, a few kilometers south of the French border. After Geneva, Lausanne and Fribourg, it is the fourth largest city loc ...

in Switzerland, which contains a public library of horology. The Musée d'Horlogerie du Locle is smaller but located nearby. Other good horological libraries providing public access are at the

in Switzerland, at

, and at

Le Locle Le Locle (; german: Luggli) is a municipality in the Canton of Neuchâtel in Switzerland. It is situated in the Jura Mountains, a few kilometers from the city of La Chaux-de-Fonds. It is the third smallest city in Switzerland (in Switzerland a ...

. In France,

Besançon Besançon (, , , ; archaic german: Bisanz; la, Vesontio) is the prefecture of the department of Doubs in the region of Bourgogne-Franche-Comté. The city is located in Eastern France, close to the Jura Mountains and the border with Switzerla ...

has the Musée du Temps (Museum of Time) in the historic Palais Grenvelle. In

Serpa Serpa () is a city and a Concelho (municipality) in the central Portuguese region Alentejo. The population in 2011 was 15,623, in an area of . The Guadiana River flows close to the town of Serpa. History Serpa has its origins in early settl ...

and

Évora Évora ( , ) is a city and a municipality in Portugal. It has 53,591 inhabitants (2021), in an area of 1307.08 km2. It is the historic capital of the Alentejo and serves as the seat of the Évora District. Due to its well-preserved old to ...

, in

Portugal Portugal, officially the Portuguese Republic, In recognized minority languages of Portugal: :* mwl, República Pertuesa is a country located on the Iberian Peninsula, in Southwestern Europe, and whose territory also includes the Macaronesian ...

, there is the Museu do Relógio. In Germany, there is the

Deutsches Uhrenmuseum The German Clock Museum (german: Deutsches Uhrenmuseum) is situated near the centre of the Black Forest town of Furtwangen im Schwarzwald (Germany), a historical centre of clockmaking. It features permanent and temporary exhibits on the history of t ...

Furtwangen im Schwarzwald Furtwangen im Schwarzwald (; Low Alemannic: ''Furtwange im Schwarzwald'') is a small city located in the Black Forest region of southwestern Germany. Together with Villingen-Schwenningen, Furtwangen is part of the district (German: Kreis) of Sc ...

, in the

Black Forest The Black Forest (german: Schwarzwald ) is a large forested mountain range in the state of Baden-Württemberg in southwest Germany, bounded by the Rhine Valley to the west and south and close to the borders with France and Switzerland. It is ...

, which contains a public library of horology.

In North America

The two leading specialised horological museums in North America are the National Watch and Clock Museum in Columbia, Pennsylvania, and the

American Clock and Watch Museum The American Clock & Watch Museum (ACWM), located in Bristol, Connecticut, is one of a very few museums in the United States dedicated solely to horology, which is the history, science and art of timekeeping and timekeepers. Located in the h ...

Bristol, Connecticut Bristol is a suburban city located in Hartford County, Connecticut, United States, southwest-west of Hartford. The city is also 120 miles southwest from Boston, and approximately 100 miles northeast of New York City. As of the 2020 census, the ...

. Another museum dedicated to clocks is the Willard House and Clock Museum in

Grafton, Massachusetts Grafton is a town in Worcester County, Massachusetts, United States. The population was 19,664 at the 2020 census. The town consists of the North Grafton, Grafton, and South Grafton geographic areas, each with a separate ZIP Code. Incorporated in ...

. One of the most comprehensive horological libraries open to the public is the

National Watch and Clock Library Fortunat Mueller-Maerki Library & Research Center is one of the world's pre-eminent libraries devoted to horology and is located in Columbia, Pennsylvania, United States. It is operated by the National Association of Watch and Clock Collectors, ...

in Columbia, Pennsylvania.

Organizations

Notable scholarly horological organizations include: *

American Watchmakers-Clockmakers Institute The American Watchmakers-Clockmakers Institute (AWCI) is a not-for-profit trade association based in the United States that is dedicated to the advancement of the modern watch industry, from which it receives a significant portion of its funding ...

– AWCI (United States of America) *

Antiquarian Horological Society The Antiquarian Horological Society, abbreviated to AHS, is the UK-based learned society for scholars and enthusiasts of horology. Its administrative office is at 4 Lovat Lane, a listed building close to the Monument, in the City of London. In ...

– AHS (United Kingdom) *

– BHI (United Kingdom) * Chronometrophilia (Switzerland) * Deutsche Gesellschaft für Chronometrie – DGC (Germany)
Horological Society of New York
– HSNY (United States of America) * National Association of Watch and Clock Collectors – NAWCC (United States of America)
UK Horology
- UK Clock & Watch Company based in Bristol

World exhibitions

* Geneva Time Exhibition * Salon International de la Haute Horlogerie (SIHH)

History

Museums and libraries

In Europe

In North America

Organizations

World exhibitions

Glossary

See also

References

Further reading