1781 in science
Encyclopedia
The year 1781 in science
and technology
involved some significant events.
Science
Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe...
and technology
Technology
Technology is the making, usage, and knowledge of tools, machines, techniques, crafts, systems or methods of organization in order to solve a problem or perform a specific function. It can also refer to the collection of such tools, machinery, and procedures. The word technology comes ;...
involved some significant events.
Astronomy
- William HerschelWilliam HerschelSir Frederick William Herschel, KH, FRS, German: Friedrich Wilhelm Herschel was a German-born British astronomer, technical expert, and composer. Born in Hanover, Wilhelm first followed his father into the Military Band of Hanover, but emigrated to Britain at age 19...
discovers UranusUranusUranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. It is named after the ancient Greek deity of the sky Uranus , the father of Cronus and grandfather of Zeus...
. - Charles MessierCharles MessierCharles Messier was a French astronomer most notable for publishing an astronomical catalogue consisting of deep sky objects such as nebulae and star clusters that came to be known as the 110 "Messier objects"...
publishes final catalogue of Messier objects. - March 20 - Pierre MéchainPierre MéchainPierre François André Méchain was a French astronomer and surveyor who, with Charles Messier, was a major contributor to the early study of deep sky objects and comets.-Life:...
discovers dwarf galaxyDwarf galaxyA dwarf galaxy is a small galaxy composed of up to several billion stars, a small number compared to our own Milky Way's 200-400 billion stars...
NGC 5195NGC 5195NGC 5195 is a dwarf galaxy that is interacting with the Whirlpool Galaxy . Both galaxies are located approximately 25 million light-years away in the constellation Canes Venatici...
.
Biology
- Felix Fontana uses a microscopeMicroscopeA microscope is an instrument used to see objects that are too small for the naked eye. The science of investigating small objects using such an instrument is called microscopy...
to describe the axonAxonAn axon is a long, slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neuron's cell body or soma....
of a brain cellBrain CellBrain Cell is a mail art project begun by Ryosuke Cohen in June 1985. The project is basically a networked art project where individual artists create their own 30x42cm work of art with stamps, drawings, stickers and so forth. This is sent to Cohen, who prints each cell - 150 copies each - with a...
. - John LathamJohn Latham (ornithologist)John Latham was an English physician, naturalist and author. He was born at Eltham in Kent, and was the eldest son of John Latham, a surgeon there, and his mother was a descendant of the Sothebys, in Yorkshire....
begins publication of A General Synopsis of Birds.
Chemistry
- Carl Wilhelm ScheeleCarl Wilhelm ScheeleCarl Wilhelm Scheele was a German-Swedish pharmaceutical chemist. Isaac Asimov called him "hard-luck Scheele" because he made a number of chemical discoveries before others who are generally given the credit...
ascertains that a new acidAcidAn acid is a substance which reacts with a base. Commonly, acids can be identified as tasting sour, reacting with metals such as calcium, and bases like sodium carbonate. Aqueous acids have a pH of less than 7, where an acid of lower pH is typically stronger, and turn blue litmus paper red...
can be made from tungstenite, leading to the discovery of tungstenTungstenTungsten , also known as wolfram , is a chemical element with the chemical symbol W and atomic number 74.A hard, rare metal under standard conditions when uncombined, tungsten is found naturally on Earth only in chemical compounds. It was identified as a new element in 1781, and first isolated as...
in 17831783 in scienceThe year 1783 in science and technology involved some significant events.-Aviation:* June 5 - The Montgolfier brothers send up at Annonay, near Lyon, a 900 m linen hot air balloon as a public demonstration...
. - Autumn - Peter Jacob Hjelm isolates molybdenumMolybdenumMolybdenum , is a Group 6 chemical element with the symbol Mo and atomic number 42. The name is from Neo-Latin Molybdaenum, from Ancient Greek , meaning lead, itself proposed as a loanword from Anatolian Luvian and Lydian languages, since its ores were confused with lead ores...
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Births
- January 30 - Adelbert von ChamissoAdelbert von ChamissoAdelbert von Chamisso was a German poet and botanist.- Life :He was born Louis Charles Adélaïde de Chamissot at the château of Boncourt at Ante, in Champagne, France, the ancestral seat of his family...
, poetPoetA poet is a person who writes poetry. A poet's work can be literal, meaning that his work is derived from a specific event, or metaphorical, meaning that his work can take on many meanings and forms. Poets have existed since antiquity, in nearly all languages, and have produced works that vary...
and botanist (d. 18381838 in scienceThe year 1838 in science and technology involved some significant events, listed below.-Astronomy:* Friedrich Wilhelm Bessel makes the first accurate measurement of distance to a star, 61 Cygni, using parallax...
) - February 17 - Rene Theophile Hyacinthe Laennec, FrenchFranceThe French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...
physicianPhysicianA physician is a health care provider who practices the profession of medicine, which is concerned with promoting, maintaining or restoring human health through the study, diagnosis, and treatment of disease, injury and other physical and mental impairments...
, inventor of the stethoscopeStethoscopeThe stethoscope is an acoustic medical device for auscultation, or listening to the internal sounds of an animal body. It is often used to listen to lung and heart sounds. It is also used to listen to intestines and blood flow in arteries and veins...
(d. 18261826 in scienceThe year 1826 in science and technology involved some significant events, listed below.-Chemistry:* Antoine Jerome Balard isolates bromine.* Michael Faraday determines the chemical formula of naphthalene.-Mathematics:...
) - May 29 - John WalkerJohn Walker (inventor)John Walker was an English chemist who invented the friction match.-Life and work:Walker was born in Stockton-on-Tees in 1781. He went to the local grammar school and was afterwards apprenticed to Watson Alcock, the principal surgeon of the town serving him as an assistant-surgeon...
, EnglishEnglish peopleThe English are a nation and ethnic group native to England, who speak English. The English identity is of early mediaeval origin, when they were known in Old English as the Anglecynn. England is now a country of the United Kingdom, and the majority of English people in England are British Citizens...
chemistChemistA chemist is a scientist trained in the study of chemistry. Chemists study the composition of matter and its properties such as density and acidity. Chemists carefully describe the properties they study in terms of quantities, with detail on the level of molecules and their component atoms...
(d. 18591859 in scienceThe year 1859 in science and technology involved some significant events, listed below.-Astronomy:* August 28–September 2 - The solar storm of 1859, the largest geomagnetic solar storm on record, causes the Northern lights aurora to be visible as far south as Cuba and knocks out telegraph...
) - June 9 - George StephensonGeorge StephensonGeorge Stephenson was an English civil engineer and mechanical engineer who built the first public railway line in the world to use steam locomotives...
, English locomotiveLocomotiveA locomotive is a railway vehicle that provides the motive power for a train. The word originates from the Latin loco – "from a place", ablative of locus, "place" + Medieval Latin motivus, "causing motion", and is a shortened form of the term locomotive engine, first used in the early 19th...
engineerEngineerAn engineer is a professional practitioner of engineering, concerned with applying scientific knowledge, mathematics and ingenuity to develop solutions for technical problems. Engineers design materials, structures, machines and systems while considering the limitations imposed by practicality,...
(d. 18481848 in scienceThe year 1848 in science and technology involved some significant events, listed below.-Events:* September 20 - The American Association for the Advancement of Science is set up in Pennsylvania by re-formation of the Association of American Geologists and Naturalists, with William Charles Redfield...
) - June 21 - Simeon Poisson, mathematicianMathematicianA mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....
(d. 18401840 in scienceThe year 1840 in science and technology involved some significant events, listed below.-Events:* William Whewell publishes the term scientist....
) - July 6 - Thomas Stamford Raffles, founder of the Zoological Society of LondonZoological Society of LondonThe Zoological Society of London is a charity devoted to the worldwide conservation of animals and their habitats...
(d. 1826) - September 14 - James WalkerJames Walker (engineer)James Walker, FRS, was an influential Scottish civil engineer of the first half of the 19th century.Walker was born in Falkirk and was apprenticed to his uncle Ralph Walker in approximately 1800, with whom he gained experience working on the design and construction of the West India and East India...
, ScottishScottish peopleThe Scottish people , or Scots, are a nation and ethnic group native to Scotland. Historically they emerged from an amalgamation of the Picts and Gaels, incorporating neighbouring Britons to the south as well as invading Germanic peoples such as the Anglo-Saxons and the Norse.In modern use,...
civil engineerCivil engineerA civil engineer is a person who practices civil engineering; the application of planning, designing, constructing, maintaining, and operating infrastructures while protecting the public and environmental health, as well as improving existing infrastructures that have been neglected.Originally, a...
(d. 18621862 in scienceThe year 1862 in science and technology involved some significant events, listed below.-Astronomy:* January 31 - Alvan Graham Clark makes the first observation of Sirius B, a white dwarf star, through an eighteen inch telescope at Northwestern University....
) - October 5 - Bernhard Bolzano, mathematicianMathematicianA mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....
(d. 1848) - December 11 - David BrewsterDavid BrewsterSir David Brewster KH PRSE FRS FSA FSSA MICE was a Scottish physicist, mathematician, astronomer, inventor, writer and university principal.-Early life:...
, Scottish physicistPhysicistA physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...
(d. 18681868 in scienceThe year 1868 in science and technology involved some significant events, listed below.-Biology:* Jules-Emile Planchon and colleagues propose Phylloxera as the cause of the Great French Wine Blight....
)