Editing 1671 in science

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{{Science year nav|1671}}

The year '''1671 in [[science]]''' and [[technology]] involved some significant events.

==Astronomy==
* Completion of [[Paris Observatory]], the world's first such national institution.<ref>{{cite web|url=http://www.paris-walking-tours.com/observatoryofparis.html|publisher=Paris Walking Tours|title=Observatory of Paris|accessdate=2011-05-10}}</ref>
* February 27 – The [[Ortenau]] meteorite lands in Germany.
* October 25 – Italian-born French astronomer [[Giovanni Domenico Cassini]] discovers [[Iapetus (moon)|Iapetus]], the second known moon of the planet [[Saturn]].

==Mathematics==
* [[James Gregory (mathematician)|James Gregory]] develops a series expansion for the [[inverse tangent]] function and discovers [[Taylor's theorem]].
* {{nihongo|Sawaguchi Kazuyuki|沢口 一之}} publishes ''Kokin-Sanpo-Ki'' (古今算法之記), in which he gives the first comprehensive applied account of [[China|Chinese]] [[algebra]] in [[Japan]].

==Medicine==
* Publication of ''Les secrets de la medecine des Chinois'', the first Western book on traditional Eastern medicine, in [[Grenoble]].
* Publication of [[Jane Sharp]]'s ''The Midwives Book: or the Whole Art of Midwifry Discovered'', the first on the subject to be written by an Englishwoman.<ref>{{cite journal|last=Bosanquet|first=Anna|date=2009|title=Inspiration from the past (1) Jane Sharp|url=http://www2.warwick.ac.uk/fac/arts/history/students/eportfolios/bosanquet/publications_presentations/sharp_practising_midwife_article.pdf|journal=The Practising Midwife|volume=12|issue=8|pages=33–35|pmid=19813367}}</ref>

==Physics==
* [[Jacques Rohault]] publishes ''Traité de physique'' in Paris, disseminating [[Cartesian physics]].

==Technology==
* March 31 – The English [[Royal Navy]] launches [[HMS Royal James (1671)|HMS ''Royal James'']] at [[Portsmouth Royal Dockyard]], its first warship to have a frame reinforced by iron bars rather than an all wooden ship, an innovation by naval architect [[Anthony Deane (shipwright)|Anthony Deane]].

==Births==
* October 1 – [[Guido Grandi]], [[Italian people|Italian]] [[mathematician]] (died [[1742 in science|1742]])

==Deaths==
* June 25 – [[Giovanni Battista Riccioli]], Italian [[astronomer]] (born [[1598 in science|1598]])

==References==
{{reflist}}

[[Category:1671 in science| ]]
[[Category:17th century in science]]
[[Category:1670s in science]]