The year 1835 in

science Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. Modern science is typically divided into twoor threemajor branches: the natural sciences, which stu ...

and

technology Technology is the application of Conceptual model, conceptual knowledge to achieve practical goals, especially in a reproducible way. The word ''technology'' can also mean the products resulting from such efforts, including both tangible too ...

involved some significant events, listed below.

Astronomy

* August 5 – First sighting of the return of Comet Halley by Father Dominique Dumouchel, director of the

Collegio Romano The Roman College (, ) was a school established by St. Ignatius of Loyola in 1551, just 11 years after he founded the Society of Jesus (Jesuits). It quickly grew to include classes from elementary school through university level and moved to seve ...

at the

Vatican Vatican may refer to: Geography * Vatican City, an independent city-state surrounded by Rome, Italy * Vatican Hill, in Rome, namesake of Vatican City * Ager Vaticanus, an alluvial plain in Rome * Vatican, an unincorporated community in the ...

. It is next seen on August 21 by Friedrich Georg Wilhelm Struve at the Dorpat Observatory.

John Herschel Sir John Frederick William Herschel, 1st Baronet (; 7 March 1792 – 11 May 1871) was an English polymath active as a mathematician, astronomer, chemist, inventor and experimental photographer who invented the blueprint and did botanical work. ...

had been expected to find the comet first, as he was at the time in

South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...

with his 20 ft focal length reflector – at this time the world's largest telescope. He finally observes it in October and watches until it reaches

perihelion An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of apsides (also called apse line, or major axis of the orbit) is the line connecting the two extreme values. Apsides perta ...

November 16. It reappears in January 1836, and Herschel will be the last person to observe it in May. * August 25 – The first of six articles on discoveries of living creatures on the Moon supposedly made by Herschel and a fictitious companion named Dr. Andrew Grant is published in the ''

New York Sun ''The New York Sun'' is an American conservative news website and former newspaper based in Manhattan, New York. From 2009 to 2021, it operated as an (occasional and erratic) online-only publisher of political and economic opinion pieces, as we ...

''. This incident is now known as the

Great Moon Hoax The "Great Moon Hoax", also known as the "Great Moon Hoax of 1835", was a series of six articles published in ''The Sun (New York City), The Sun'' (a New York newspaper), beginning on August 25, 1835, about the supposed discovery of life and civ ...

. *

Berlin Observatory The Berlin Observatory (Berliner Sternwarte) is a German astronomical institution with a series of observatories and related organizations in and around the city of Berlin in Germany, starting from the 18th century. It has its origins in 1700 w ...

opened. * Caroline Herschel and

Mary Somerville Mary Somerville ( ; , formerly Greig; 26 December 1780 – 29 November 1872) was a Scottish scientist, writer, and polymath. She studied mathematics and astronomy, and in 1835 she and Caroline Herschel were elected as the first female Honorar ...

become the first women members of the

Royal Astronomical Society The Royal Astronomical Society (RAS) is a learned society and charitable organisation, charity that encourages and promotes the study of astronomy, planetary science, solar-system science, geophysics and closely related branches of science. Its ...

Biology

* January – J. C. Loudon begins publication of ''Arboretum et Fruticetum Britannicum''. *

Cell division Cell division is the process by which a parent cell (biology), cell divides into two daughter cells. Cell division usually occurs as part of a larger cell cycle in which the cell grows and replicates its chromosome(s) before dividing. In eukar ...

is first observed under the

microscope A microscope () is a laboratory equipment, laboratory instrument used to examine objects that are too small to be seen by the naked eye. Microscopy is the science of investigating small objects and structures using a microscope. Microscopic ...

by German botanist Hugo von Mohl as he works over

green algae The green algae (: green alga) are a group of chlorophyll-containing autotrophic eukaryotes consisting of the phylum Prasinodermophyta and its unnamed sister group that contains the Chlorophyta and Charophyta/ Streptophyta. The land plants ...

''Cladophora glomerata''.

Chemistry

Vinyl chloride Vinyl chloride is an organochloride with the formula H2C =CHCl. It is also called vinyl chloride monomer (VCM) or chloroethene. It is an important industrial chemical chiefly used to produce the polymer polyvinyl chloride (PVC). Vinyl chloride is a ...

first produced by

Justus von Liebig Justus ''Freiherr'' von Liebig (12 May 1803 – 18 April 1873) was a Germans, German scientist who made major contributions to the theory, practice, and pedagogy of chemistry, as well as to agricultural and biology, biological chemistry; he is ...

and his student

Henri Victor Regnault Henri Victor Regnault (21 July 1810 – 19 January 1878) was a French chemist and physicist best known for his careful measurements of the thermal properties of gases. He was an early thermodynamicist and was mentor to William Thomson in ...

Geology

* Ordnance Geological Survey founded in

Britain Britain most often refers to: * Great Britain, a large island comprising the countries of England, Scotland and Wales * The United Kingdom of Great Britain and Northern Ireland, a sovereign state in Europe comprising Great Britain and the north-eas ...

, under

Henry De la Beche Sir Henry Thomas De la Beche KCB, FRS (10 February 179613 April 1855) was an English geologist and palaeontologist, the first director of the Geological Survey of Great Britain, who helped pioneer early geological survey methods. He was the ...

, the world's first national geological survey. * Roderick Murchison names the

Silurian The Silurian ( ) is a geologic period and system spanning 23.5 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the third and shortest period of t ...

period, and

Adam Sedgwick Adam Sedgwick FRS (; 22 March 1785 – 27 January 1873) was a British geologist and Anglican priest, one of the founders of modern geology. He proposed the Cambrian and Devonian period of the geological timescale. Based on work which he did ...

the

Cambrian The Cambrian ( ) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. The Cambrian lasted 51.95 million years from the end of the preceding Ediacaran period 538.8 Ma (million years ago) to the beginning of the Ordov ...

Mathematics

Adolphe Quetelet Lambert Adolphe Jacques Quetelet FRSF or FRSE (; 22 February 1796 – 17 February 1874) was a Belgian- French astronomer, mathematician, statistician and sociologist who founded and directed the Brussels Observatory and was influential ...

publishes ''Sur l'homme et le développement de ses facultés, ou Essai de physique sociale'' (translated as ''Treatise on Man''), outlining his theory of "social physics" and describing his concept of the "average man" (''l'homme moyen'') who is characterized by the

mean value A mean is a quantity representing the "center" of a collection of numbers and is intermediate to the extreme values of the set of numbers. There are several kinds of means (or "measures of central tendency") in mathematics, especially in statist ...

s of measured variables that follow a

normal distribution In probability theory and statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable. The general form of its probability density function is f(x) = \frac ...

Physics

George Biddell Airy Sir George Biddell Airy (; 27 July 18012 January 1892) was an English mathematician and astronomer, as well as the Lucasian Professor of Mathematics from 1826 to 1828 and the seventh Astronomer Royal from 1835 to 1881. His many achievements inc ...

provides the first full explanation of the

Airy disk In optics, the Airy disk (or Airy disc) and Airy pattern are descriptions of the best-focus (optics), focused Point source#Light, spot of light that a perfect lens (optics), lens with a circular aperture can make, limited by the diffraction of ...

phenomenon. *

Gaspard-Gustave Coriolis Gaspard-Gustave de Coriolis (; 21 May 1792 – 19 September 1843) was a French mathematician, mechanical engineer and scientist. He is best known for his work on the supplementary forces that are detected in a rotating frame of reference, le ...

examines motion on a spinning surface and deduces the

Coriolis effect In physics, the Coriolis force is a pseudo force that acts on objects in motion within a frame of reference that rotates with respect to an inertial frame. In a reference frame with clockwise rotation, the force acts to the left of the moti ...

. *

William Rowan Hamilton Sir William Rowan Hamilton (4 August 1805 – 2 September 1865) was an Irish astronomer, mathematician, and physicist who made numerous major contributions to abstract algebra, classical mechanics, and optics. His theoretical works and mathema ...

states Hamilton's equations of motion.

Physiology and medicine

* Irish

physician A physician, medical practitioner (British English), medical doctor, or simply doctor is a health professional who practices medicine, which is concerned with promoting, maintaining or restoring health through the Medical education, study, Med ...

Robert James Graves first describes symptoms of

Graves' disease Graves' disease, also known as toxic diffuse goiter or Basedow's disease, is an autoimmune disease that affects the thyroid. It frequently results in and is the most common cause of hyperthyroidism. It also often results in an enlarged thyro ...

. * French physician Pierre Charles Alexandre Louis publishes his book ''Recherches sur les effets de la saignée dans quelques maladies inflammatoires et sur l'action de l'émétique et des vésicatoires dans la pneumonie'' in

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...

, in which he analyzes case studies to demonstrate that

bloodletting Bloodletting (or blood-letting) was the deliberate withdrawal of blood from a patient to prevent or cure illness and disease. Bloodletting, whether by a physician or by leeches, was based on an ancient system of medicine in which blood and othe ...

is largely ineffective as a treatment. * Belgian statistician

publishes his books ''Sur l'homme et le développement de ses facultés, ou Essai de physique sociale'', in which he presents his theory of human

variance In probability theory and statistics, variance is the expected value of the squared deviation from the mean of a random variable. The standard deviation (SD) is obtained as the square root of the variance. Variance is a measure of dispersion ...

around the

average In colloquial, ordinary language, an average is a single number or value that best represents a set of data. The type of average taken as most typically representative of a list of numbers is the arithmetic mean the sum of the numbers divided by ...

, with human traits being distributed according to a normal curve.

Technology

* August – H. Fox Talbot exposes the world's first known photographic negatives at

Lacock Abbey Lacock Abbey in the village of Lacock, Wiltshire, England, was founded in the early 13th century by Ela, Countess of Salisbury, as a nunnery of the Augustinian order. The abbey remained a nunnery until the Dissolution of the monasteries in ...

Wiltshire Wiltshire (; abbreviated to Wilts) is a ceremonial county in South West England. It borders Gloucestershire to the north, Oxfordshire to the north-east, Berkshire to the east, Hampshire to the south-east, Dorset to the south, and Somerset to ...

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

. * September 12 – A

Prussia Prussia (; ; Old Prussian: ''Prūsija'') was a Germans, German state centred on the North European Plain that originated from the 1525 secularization of the Prussia (region), Prussian part of the State of the Teutonic Order. For centuries, ...

patent A patent is a type of intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an sufficiency of disclosure, enabling discl ...

is granted to Wilhelm Friedrich Wieprecht and Carl Moritz for a valved bass

tuba The tuba (; ) is the largest and lowest-pitched musical instrument in the brass instrument, brass family. As with all brass instruments, the sound is produced by lip vibrationa buzzinto a mouthpiece (brass), mouthpiece. It first appeared in th ...

. *

Samuel Colt Samuel Colt (; July 19, 1814 – January 10, 1862) was an American inventor, industrialist, and businessman who established Colt's Patent Fire-Arms Manufacturing Company and made the mass production of revolvers commercially viable. Col ...

invents the

revolver A revolver is a repeating handgun with at least one barrel and a revolving cylinder containing multiple chambers (each holding a single cartridge) for firing. Because most revolver models hold six cartridges before needing to be reloaded, ...

. *

Joseph Henry Joseph Henry (December 17, 1797– May 13, 1878) was an American physicist and inventor who served as the first secretary of the Smithsonian Institution. He was the secretary for the National Institute for the Promotion of Science, a precursor ...

invents the electric

relay A relay Electromechanical relay schematic showing a control coil, four pairs of normally open and one pair of normally closed contacts An automotive-style miniature relay with the dust cover taken off A relay is an electrically operated switc ...

. *

Samuel Morse Samuel Finley Breese Morse (April 27, 1791 – April 2, 1872) was an American inventor and painter. After establishing his reputation as a portrait painter, Morse, in his middle age, contributed to the invention of a Electrical telegraph#Morse ...

develops the

Morse code Morse code is a telecommunications method which Character encoding, encodes Written language, text characters as standardized sequences of two different signal durations, called ''dots'' and ''dashes'', or ''dits'' and ''dahs''. Morse code i ...

Awards

Copley Medal The Copley Medal is the most prestigious award of the Royal Society of the United Kingdom, conferred "for sustained, outstanding achievements in any field of science". The award alternates between the physical sciences or mathematics and the bio ...

: William Snow Harris * Wollaston Medal:

Gideon Mantell Gideon Algernon Mantell Membership of the Royal College of Surgeons, MRCS Fellow of the Royal Society, FRS (3 February 1790 – 10 November 1852) was an English obstetrician, geologist and paleontology, palaeontologist. His attempts to reconstr ...

Births

* March 12 –

Simon Newcomb Simon Newcomb (March 12, 1835 – July 11, 1909) was a Canadians, Canadian–Americans, American astronomer, applied mathematician, and autodidactic polymath. He served as Professor of Mathematics in the United States Navy and at Johns Hopkins ...

(died 1909),

Canadian Canadians () are people identified with the country of Canada. This connection may be residential, legal, historical or cultural. For most Canadians, many (or all) of these connections exist and are collectively the source of their being ''C ...

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, mathematical structure, structure, space, Mathematica ...

and

astronomer An astronomer is a scientist in the field of astronomy who focuses on a specific question or field outside the scope of Earth. Astronomers observe astronomical objects, such as stars, planets, natural satellite, moons, comets and galaxy, galax ...

. * March 14 – Giovanni Schiaparelli (died 1910), Italian astronomer. * March 24 – Joseph Stefan (died 1893), Austro- Slovene

physicist A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate cau ...

and mathematician. * March 29 – Gustav Zander (died 1920), Swedish

. * August 2 –

Elisha Gray Elisha Gray (August 2, 1835 – January 21, 1901) was an American electrical engineering, electrical engineer who co-founded the Western Electric, Western Electric Manufacturing Company. Gray is best known for his Invention of the telephone, dev ...

(died 1901), American

electrical engineer Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems that use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the l ...

. * October 1 – Ádám Politzer (died

1920 Events January * January 1 ** Polish–Soviet War: The Russian Red Army increases its troops along the Polish border from 4 divisions to 20. ** Kauniainen in Finland, completely surrounded by the city of Espoo, secedes from Espoo as its ow ...

), Hungarian otologist. * November 6 –

Cesare Lombroso Cesare Lombroso ( , ; ; born Ezechia Marco Lombroso; 6 November 1835 – 19 October 1909) was an Italian eugenicist, criminologist, phrenologist, physician, and founder of the Italian school of criminology. He is considered the founder of m ...

(died 1909), Italian forensic psychiatrist.

Deaths

* August 18 –

Friedrich Stromeyer Friedrich Stromeyer FRS(For) FRSE (2 August 1776 – 18 August 1835) was a German chemist. He was the discoverer of cadmium. From 1982, the Friedrich Stromeyer Prize has been awarded for chemical achievement in Germany. Biography He was born i ...

(born

1776 Events January–February * January 1 – American Revolutionary War – Burning of Norfolk: The town of Norfolk, Virginia is destroyed, by the combined actions of the British Royal Navy and occupying Patriot forces. * January ...

), German

chemist A chemist (from Greek ''chēm(ía)'' alchemy; replacing ''chymist'' from Medieval Latin ''alchemist'') is a graduated scientist trained in the study of chemistry, or an officially enrolled student in the field. Chemists study the composition of ...

. * September 14 – John Brinkley (born 1763),

British British may refer to: Peoples, culture, and language * British people, nationals or natives of the United Kingdom, British Overseas Territories and Crown Dependencies. * British national identity, the characteristics of British people and culture ...

astronomer. * September 23 –

Antide Janvier Antide Janvier (1 July 1751 – 23 September 1835) was a French clockmaker. Life Antide Janvier was born in a village in the Jura (département), Jura, and learned the basics of his trade from his father, and was educated in Latin, Greek ...

(born 1751), French precision clockmaker. * November 21 – Hanaoka Seishū (born

1760 Events January–March * January 9 – Battle of Barari Ghat: Afghan forces defeat the Marathas. * January 22 – Seven Years' War – Battle of Wandiwash, India: British general Sir Eyre Coote is victorious over th ...

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

ese

surgeon In medicine, a surgeon is a medical doctor who performs surgery. Even though there are different traditions in different times and places, a modern surgeon is a licensed physician and received the same medical training as physicians before spec ...

References

{{reflist 19th century in science 1830s in science