The year 1686 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.

Astronomy

Gottfried Kirch Gottfried Kirch (; also KircheKenneth Glyn Jones, ''The Search for the Nebulae'', Alpha Academic, 1975, p. 19. , Kirkius; 18 December 1639 – 25 July 1710) was a German astronomer and the first "Astronomer Royal" in Berlin and, as such, director ...

notices that Chi Cygni's brightness varies.

Biology

John Ray John Ray Fellow of the Royal Society, FRS (November 29, 1627 – January 17, 1705) was a Christian England, English Natural history, naturalist widely regarded as one of the earliest of the English parson-naturalists. Until 1670, he wrote his ...

begins publication of his '' Historia Plantarum'', including the first biological definition of the term ''

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

''; also his edition of

Francis Willughby Francis Willughby (sometimes spelt Willoughby, ) Fellow of the Royal Society, FRS (22 November 1635 – 3 July 1672) was an English ornithology, ornithologist, ichthyology, ichthyologist and mathematician, and an early student of linguistics an ...

's ''Historia Piscum''.

Geology

Edmund Halley Edmond (or Edmund) Halley (; – ) was an English astronomer, mathematician and physicist. He was the second Astronomer Royal in Britain, succeeding John Flamsteed in 1720. From an observatory he constructed on Saint Helena in 1676–77, H ...

establishes the relationship between

barometric pressure Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as , which is equivalent to 1,013.2 ...

and height above sea level.

Meteorology

* Edmund Halley presents a systematic study of the

trade wind The trade winds or easterlies are permanent east-to-west prevailing winds that flow in the Earth's equatorial region. The trade winds blow mainly from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisphere, ...

s and

monsoon A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in Atmosphere of Earth, atmospheric circulation and precipitation associated with annu ...

s and identifies solar heating as the cause of

atmospheric An atmosphere () is a layer of gases that envelop an astronomical object, held in place by the gravity of the object. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A stellar atmosphere ...

motions.

Physics

Isaac Newton Sir Isaac Newton () was an English polymath active as a mathematician, physicist, astronomer, alchemist, theologian, and author. Newton was a key figure in the Scientific Revolution and the Age of Enlightenment, Enlightenment that followed ...

uses a fixed length

pendulum A pendulum is a device made of a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate i ...

with weights of varying composition to test the weak

equivalence principle The equivalence principle is the hypothesis that the observed equivalence of gravitational and inertial mass is a consequence of nature. The weak form, known for centuries, relates to masses of any composition in free fall taking the same t ...

to 1 part in 1000.

Births

* February 10 –

Jan Frederik Gronovius Jan Frederik Gronovius (also seen as Johann Frederik and Johannes Fredericus) (10 February 1690 in Leiden – 10 July 1762 in Leiden) was a Dutch botanist notable as a patron of Carl Linnaeus, Linnaeus. John Clayton (botanist), John Clayton, a pl ...

, Dutch

botanist Botany, also called plant science, is the branch of natural science and biology studying plants, especially Plant anatomy, their anatomy, Plant taxonomy, taxonomy, and Plant ecology, ecology. A botanist or plant scientist is a scientist who s ...

(died

1762 Events January–March * January 4 – Seven Years' War: Kingdom of Great Britain, Britain declares war against Enlightenment in Spain, Spain and Kingdom of Naples, Naples, following their Treaty of Paris (1761), recent alliance ...

) * May 24 – Gabriel Fahrenheit,

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

inventor An invention is a unique or novel device, method, composition, idea, or process. An invention may be an improvement upon a machine, product, or process for increasing efficiency or lowering cost. It may also be an entirely new concept. If an ...

(died

1736 Events January–March * January 12 – George Hamilton, 1st Earl of Orkney, becomes the Second Field Marshal of Great Britain. * January 23 – The Civil Code of 1734 is passed in Sweden. * January 26 – Stanislaus I of P ...

) * July 6 –

Antoine de Jussieu Antoine de Jussieu (6 July 168622 April 1758) was a French Natural history, naturalist, botanist, and physician. Jussieu was born in Lyon. He was the son of Christophe de Jussieu (or Dejussieu), an apothecary of some repute, who published a ' ...

, French

naturalist Natural history is a domain of inquiry involving organisms, including animals, fungi, and plants, in their natural environment, leaning more towards observational than experimental methods of study. A person who studies natural history is cal ...

(died

1758 Events January–March * January 1 – Swedish biologist Carl Linnaeus (Carl von Linné) publishes in Stockholm the first volume (''Animalia'') of the 10th edition of ''Systema Naturae'', the starting point of modern zoologic ...

) * October (''possible date'') – John Machin, English

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 ...

(died 1751)

Deaths

* May 11 –

Otto von Guericke Otto von Guericke ( , , ; spelled Gericke until 1666; – ) was a German scientist, inventor, mathematician and physicist. His pioneering scientific work, the development of experimental methods and repeatable demonstrations on the physics of ...

, German

(born

1602 Events January–March * January 3 – Battle of Kinsale: The English defeat Irish rebels and their Spanish allies. (The battle happens on this date according to the Gregorian calendar used by the Irish and Spanish but on Thursday, 24 Dece ...

) * November 25 ( NS December 5) –

Nicolas Steno Niels Steensen (; Latinized to Nicolas Steno or Nicolaus Stenonius; 1 January 1638 – 25 November 1686 ) was a Danish scientist, a pioneer in both anatomy and geology who became a Catholic bishop in his later years. He has been beatified ...

, Danish pioneer

geologist A geologist is a scientist who studies the structure, composition, and History of Earth, history of Earth. Geologists incorporate techniques from physics, chemistry, biology, mathematics, and geography to perform research in the Field research, ...

and bishop (born

1638 Events January–March * January 4 **A naval battle takes place in the Indian Ocean off the coast of Goa in South India as a Netherlands fleet commanded by Admiral Adam Westerwolt decimates the Portuguese fleet. **A fleet of 80 Spanis ...

)

References

{{reflist 17th century in science 1680s in science