Editing Johann Heinrich Lambert (section)

==Biography==
Lambert was born in 1728 into a [[Huguenot]] family in the city of [[Mulhouse]]<ref name=trinity/> (now in <!--[[Haut-Rhin]],--> [[Alsace]], [[France]]), at that time a city-state allied to the [[Swiss Confederacy]].<ref>[https://hls-dhs-dss.ch/fr/articles/007089/2020-04-30/ Mulhouse], in the [[Historical Dictionary of Switzerland]].</ref>  Some sources give 26 August as his birth date and others 28 August.<ref>{{cite book |last1=Banham |first1=Gary |last2=Schulting |first2=Dennis |last3=Hems |first3=Nigel |title=The Bloomsbury Companion to Kant |date=26 March 2015 |publisher=Bloomsbury Academic |isbn=978-1-4725-8678-0 |page=101 |url=https://books.google.com/books?id=HMWFBwAAQBAJ |language=en}}</ref><ref>{{cite web |title=Johann Heinrich Lambert |url=https://www.britannica.com/biography/Johann-Heinrich-Lambert |website=Encyclopedia Britannica |access-date=24 August 2020 |language=en}}</ref><ref name=trinity/>  Leaving school at 12, he continued to study in his free time while undertaking a series of jobs.  These included assistant to his father (a tailor), a clerk at a nearby iron works, a private tutor, secretary to the editor of ''Basler Zeitung'' and, at the age of 20, private tutor to the sons of Count Salis in [[Chur]].  Travelling Europe with his charges (1756–1758) allowed him to meet established mathematicians in the German states, The Netherlands, France and the Italian states. On his return to Chur he published his first books (on optics and cosmology) and began to seek an academic post. After a few short posts he was rewarded (1763) by an invitation to a position at the [[Prussian Academy of Sciences]] in Berlin, where he gained the sponsorship of [[Frederick II of Prussia]], and became a friend of [[Leonhard Euler]]. In this stimulating and financially stable environment, he worked prodigiously until his death in 1777.<ref name=trinity>[[W. W. Rouse Ball]] (1908) [http://www.maths.tcd.ie/pub/HistMath/People/Lambert/RouseBall/RB_Lambert.html Johann Heinrich Lambert (1728–1777)] via [[Trinity College, Dublin]]</ref>