Editing 1631 in science (section)

==Mathematics==
* [[William Oughtred]] publishes ''Clavis Mathematicae'', introducing the [[multiplication sign]] (×) and proportion sign (::).<ref>{{cite book|title=A History of Mathematics|authorlink=Florian Cajori|first=Florian|last=Cajori|year=1919|publisher=Macmillan|url=https://archive.org/details/ahistorymathema02cajogoog|page=[https://archive.org/details/ahistorymathema02cajogoog/page/n169 157]|quote=cajori william-oughtred multiplication.}}</ref><ref>{{cite book|first=Helena Mary|last=Pycior|authorlink=Helena Pycior|title=Symbols, Impossible Numbers, and Geometric Entanglements: British Algebra through the Commentaries on Newton's Universal Arithmetick|year=1997|page=48|isbn=0-521-48124-4}}</ref>
* Some of [[Thomas Harriot]]'s writings on [[algebra]] are published posthumously as ''Artis Analyticae Praxis''.