Editing 1644 in science

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{{Year nav topic5|1644|science}}
{{Science year nav|1644}}

The year '''1644 AD in [[science]]''' and [[technology]] involved several significant events in mathematics, technology, and medicine.

==Mathematics==
* The [[Basel problem]] is posed by [[Pietro Mengoli]], and will puzzle [[mathematician]]s until solved by [[Leonhard Euler]] in [[1735 in science|1735]].<ref>{{cite book|last1=Sandifer|first1=C. Edward|title=How Euler Did It|date=2007|publisher=MAA|isbn=9780883855638|page=205|url=https://books.google.com/books?id=sohHs7ExOsYC&pg=PA205|language=en}}</ref>

==Technology==
* [[Jacob van Eyck]] collaborates with the [[bellfounding]] duo [[Pieter and François Hemony]] to create the first tuned [[carillon]] in [[Zutphen]].<ref>{{cite book|last=Lehr|first=André|title=The Art of the Carillon in the Low Countries|location=Tielt, Belgium|publisher=Lannoo|year=1991|isbn=90-209-1917-2}}</ref>

==Publications==
* [[Jan Baptist van Helmont]] publishes ''Dageraad ofte Nieuwe Opkomst der Geneeskunst'' ("Daybreak, or the New Rise of Medicine").<ref name=Helmont/>

==Births==
* 25 September – [[Ole Rømer]], [[Denmark|Danish]] [[astronomer]] who makes the first quantitative measurements of the [[speed of light]] (died [[1710 in science|1710]])<ref>{{cite web|title=Ole Rømer - Danish astronomer|url=https://www.britannica.com/biography/Ole-Romer|website=Encyclopedia Britannica|accessdate=3 April 2018|language=en}}</ref>

==Deaths==
* 2 July – [[William Gascoigne (scientist)|William Gascoigne]], [[English people|English]] scientist (born [[1610 in science|1610]])<ref>{{cite book|last1=Vaquero|first1=J. M.|last2=Vázquez|first2=M.|title=The Sun Recorded Through History|date=2009|publisher=Springer Science & Business Media|isbn=9780387927909|page=236|url=https://books.google.com/books?id=iWkyiEeiyksC&pg=PA236|language=en}}</ref>
* 30 December – [[Jan Baptist van Helmont]], [[Flemish people|Flemish]] [[chemist]] (born [[1580 in science|1580]])<ref name=Helmont>{{cite web|title=Jan Baptista van Helmont - Belgian scientist|url=https://www.britannica.com/biography/Jan-Baptista-van-Helmont|website=Encyclopedia Britannica|accessdate=3 April 2018|language=en}}</ref>

==References==
{{reflist}}

[[Category:1644]]
[[Category:17th century in science]]
[[Category:1640s in science]]