Marc-Auguste Pictet (; 23 July 1752 – 19 April 1825) was a Swiss scientific journalist and experimental

natural philosopher Natural philosophy or philosophy of nature (from Latin ''philosophia naturalis'') is the philosophical study of physics Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior throu ...

. Pictet's main contribution to learning was his editing of the scientific section of the ''

Bibliothèque Britannique The ''Bibliothèque Britannique'' was a monthly journal of the sciences and the arts published in Geneva by Marc-Auguste Pictet, his younger brother Charles, and their friend Frédéric-Guillaume Maurice. Created in 1796, it covered a wide rang ...

'' (1796-1815), a publication devoted to the diffusion on the

Continent A continent is any of several large landmasses. Generally identified by convention rather than any strict criteria, up to seven geographical regions are commonly regarded as continents. Ordered from largest in area to smallest, these seven ...

of knowledge and arts produced in

Great Britain Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is ...

. His own scientific research focused on the fields of

physical science Physical science is a branch of natural science that studies non-living systems, in contrast to life science. It in turn has many branches, each referred to as a "physical science", together called the "physical sciences". Definition Physi ...

, especially

calorimetry In chemistry and thermodynamics, calorimetry () is the science or act of measuring changes in ''state variables'' of a body for the purpose of deriving the heat transfer associated with changes of its state due, for example, to chemical reacti ...

, but also

astronomy Astronomy () is a natural science that studies astronomical object, celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and chronology of the Universe, evolution. Objects of interest ...

geology Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Ear ...

meteorology Meteorology is a branch of the atmospheric sciences (which include atmospheric chemistry and physics) with a major focus on weather forecasting. The study of meteorology dates back millennia, though significant progress in meteorology did not ...

and technology, especially

chronometry Chronometry (from Ancient Greek, 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 serv ...

and the manufacture of fine earthenware.

Life

He was born in

Geneva Geneva ( ; french: Genève ) frp, Genèva ; german: link=no, Genf ; it, Ginevra ; rm, Genevra is the List of cities in Switzerland, second-most populous city in Switzerland (after Zürich) and the most populous city of Romandy, the French-speaki ...

Republic of Geneva The Canton of Geneva, officially the Republic and Canton of Geneva (french: link=no, République et canton de Genève; frp, Rèpublica et canton de Geneva; german: Republik und Kanton Genf; it, Repubblica e Cantone di Ginevra; rm, Republica e ...

on 23 July 1752, the son of Charles Pictet, a military officer serving in the mercenary troops of the

Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Netherl ...

, and his wife, Marie Dunant. Marc-Auguste studied natural philosophy and

law Law is a set of rules that are created and are enforceable by social or governmental institutions to regulate behavior,Robertson, ''Crimes against humanity'', 90. with its precise definition a matter of longstanding debate. It has been vario ...

at the Academy of Geneva and qualified as a lawyer in 1774. After one year in England (1775–76), he became assistant to Jacques-André Mallet at the

Geneva Observatory The Geneva Observatory (french: Observatoire de Genève, german: Observatorium von Genf) is an astronomical observatory at Sauverny (CH) in the municipality of Versoix, Canton of Geneva, in Switzerland. It shares its buildings with the astronomy ...

and took an interest in

and

map-making Cartography (; from grc, χάρτης , "papyrus, sheet of paper, map"; and , "write") is the study and practice of making and using maps. Combining science, aesthetics and technique, cartography builds on the premise that reality (or an im ...

. In 1778, he made his first trip around the

Mont-Blanc Mont Blanc (french: Mont Blanc ; it, Monte Bianco , both meaning "white mountain") is the highest mountain in the Alps and Western Europe, rising above sea level. It is the List of European ultra-prominent peaks, second-most prominent mountai ...

with his master Horace-Bénédict de Saussure. In 1786, he would succeed him as professor of natural philosophy at the Academy of Geneva. By this time, he had assisted Saussure with an experiment that demonstrated the existence of what would later be called

infra-red radiation Infrared (IR), sometimes called infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. It is therefore invisible to the human eye. IR is generally understood to encompass wavelengths from around ...

. In a follow-up experiment, named 'Pictet's experiment' by

Count Rumford Sir Benjamin Thompson, Count Rumford, FRS (german: Reichsgraf von Rumford; March 26, 1753August 21, 1814) was an American-born British physicist and inventor whose challenges to established physical theory were part of the 19th-century revolut ...

, Pictet discovered that by focusing the radiation from a flask of ice onto a thermometer using two concave mirrors, the effects of

cold Cold is the presence of low temperature, especially in the atmosphere. In common usage, cold is often a subjective perception. A lower bound to temperature is absolute zero, defined as 0.00K on the Kelvin scale, an absolute thermodynamic ...

could be reflected in the same way as the effects of

heat In thermodynamics, heat is defined as the form of energy crossing the boundary of a thermodynamic system by virtue of a temperature difference across the boundary. A thermodynamic system does not ''contain'' heat. Nevertheless, the term is al ...

. The result of his experiments on heat was published in 1790 as ''Essai sur le feu'' (English translation: ''An Essay on Fire'', 1791). At this time he had already converted to

Lavoisier Antoine-Laurent de Lavoisier ( , ; ; 26 August 17438 May 1794),
CNRS (

ideas on chemistry. In 1791, Pictet was one of the twelve founding members of the . In 1796, he, his younger brother

Charles Charles is a masculine given name predominantly found in English language, English and French language, French speaking countries. It is from the French form ''Charles'' of the Proto-Germanic, Proto-Germanic name (in runic alphabet) or ''*k ...

, and his friend Frédéric-Guillaume Maurice began editing a monthly periodical entitled ''Bibliothèque Britannique'', which carried translations of significant scientific papers published in English by scholars such as

Davy Davy may refer to: * Davy (given name) * Davy (surname) * Davy lamp, a type of safety lamp with its flame encased inside a mesh screen * Davy, West Virginia, United States, a town * Davy Sound, Greenland * Davy (crater), a crater on the moon ...

Hall In architecture, a hall is a relatively large space enclosed by a roof and walls. In the Iron Age and early Middle Ages in northern Europe, a mead hall was where a lord and his retainers ate and also slept. Later in the Middle Ages, the gr ...

, Herschel,

Leslie Leslie may refer to: * Leslie (name), a name and list of people with the given name or surname, including fictional characters Families * Clan Leslie, a Scottish clan with the motto "grip fast" * Leslie (Russian nobility), a Russian noble family ...

, Playfair, Rumford and Wollaston. In addition to scientific and technical topics, the journal published extracts of British literature and articles on agriculture. After 1815, this periodical included other European materials (mainly French, German and Italian) and took from then on the name of '' Bibliothèque Universelle de Genève''. As the second director of the Geneva Observatory (1790-1819), Pictet oversaw the installation of a

meteorological station A weather station is a facility, either on land or sea, with instruments and equipment for measuring atmospheric conditions to provide information for weather forecasts and to study the weather and climate. The measurements taken include tempera ...

. In 1817, he established an additional station on

Great St. Bernard it, Colle del Gran San Bernardogerman: Grosser Sankt Bernhard , photo = Great St Bernard Pass.jpg , photo_caption = View of the pass and hospice from Great St Bernard Lake with Mont Vélan in background , elevation_m = 2469 , elevation_ref = ...

mountain in the

Alps The Alps () ; german: Alpen ; it, Alpi ; rm, Alps ; sl, Alpe . are the highest and most extensive mountain range system that lies entirely in Europe, stretching approximately across seven Alpine countries (from west to east): France, Sw ...

. In 1815, the year Geneva adhered to the

Swiss Confederation ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...

, Pictet, and were the main agents in the creation of the . Pictet was a Fellow of the

Royal Society of London The Royal Society, formally The Royal Society of London for Improving Natural Knowledge, is a learned society and the United Kingdom's national academy of sciences. The society fulfils a number of roles: promoting science and its benefits, re ...

from 1791, a Fellow of the

Royal Society of Edinburgh The Royal Society of Edinburgh is Scotland's national academy of science and letters. It is a registered charity that operates on a wholly independent and non-partisan basis and provides public benefit throughout Scotland. It was established i ...

from 1796, an ''"associé libre"'' of the

Académie des Sciences The French Academy of Sciences (French: ''Académie des sciences'') is a learned society, founded in 1666 by Louis XIV at the suggestion of Jean-Baptiste Colbert, to encourage and protect the spirit of French scientific research. It was at the ...

from 1802, and a member of the

Bavarian Academy of Sciences and Humanities The Bavarian Academy of Sciences and Humanities (german: Bayerische Akademie der Wissenschaften) is an independent public institution, located in Munich. It appoints scholars whose research has contributed considerably to the increase of knowledg ...

from 1808. His expertise, relationships and correspondence network included hundreds of scholars, extending throughout Western Europe and as far as the United States. In a letter to President

George Washington George Washington (February 22, 1732, 1799) was an American military officer, statesman, and Founding Father who served as the first president of the United States from 1789 to 1797. Appointed by the Continental Congress as commander of th ...

in 1795,

Thomas Jefferson Thomas Jefferson (April 13, 1743 – July 4, 1826) was an American statesman, diplomat, lawyer, architect, philosopher, and Founding Fathers of the United States, Founding Father who served as the third president of the United States from 18 ...

wrote that he saw Pictet and his colleagues (including Saussure and Senebrier) as ''"standing foremost among the literati of Europe"''.

Legacy

Since 1990, the Geneva Society of Physics and Natural History has offered a yearly award in history of science called the . It also awards a yearly medal to "a scholar whose work is recognized as an authority in the history of science". Winners are chosen by a panel of

University of Geneva The University of Geneva (French: ''Université de Genève'') is a public research university located in Geneva, Switzerland. It was founded in 1559 by John Calvin as a theological seminary. It remained focused on theology until the 17th centu ...

professors and field experts. The lunar crater Pictet was named in his honour in 1935 by astronomers Blagg and Müller.

Family

In 1766, he married Susanne Francoise Turrettini (1757-1811). The couple had three daughters: Dorothée Marie Anne (1777-1841), who married the Swiss Councillor of State , Caroline (1780-1841) and Albertine (1785-1834).''Généalogie de la famille Pictet de Genève, Descendants de Pierre Pictet reçu bourgeois le 14 octobre 1474'', Genève, Fondation des archives de la famille Pictet, 2010.

References

External links

*
Geneva Society of Physics and Natural History

Pictet Family Archives

Marc-Auguste Pictet Prize
* Pictet, Marc-Auguste (1791)
"An Essay on Fire"
English translation: W.B., M.D *

List of works by James Pradier This is a list of works by the Swiss-born French sculptor James Pradier (1790–1852). He was best known for his work in the neoclassical style. Works in cathedrals and churches Public statues and monuments in Paris Busts and statues of L ...

{{DEFAULTSORT:Pictet, Marc-Auguste 18th-century scientists from the Republic of Geneva Swiss meteorologists Swiss physicists Fellows of the Royal Society 1752 births 1825 deaths Fellows of the Royal Society of Edinburgh

Life

Legacy

Family

See also

References

External links