Editing 1779 (section)

=== Date unknown ===
* [[Industrial Revolution]] in England:
** [[The Iron Bridge]] is erected across the [[River Severn]] in [[Shropshire]], the world's first bridge built entirely of [[cast iron]].<ref>{{cite web|url=http://www.icons.org.uk/theicons/icons-timeline/1750-1800 |title=Icons, a portrait of England 1750–1800 |access-date=2007-08-27 |url-status=dead |archive-url=https://web.archive.org/web/20070817164134/http://www.icons.org.uk/theicons/icons-timeline/1750-1800 |archive-date=August 17, 2007 }}</ref> It will open to traffic on January 1, 1781.<ref name="Cassell's Chronology333334">{{cite book|last=Williams|first=Hywel|title=Cassell's Chronology of World History|url=https://archive.org/details/cassellschronolo0000will/page/333|url-access=registration|location=London|publisher=Weidenfeld & Nicolson|year=2005|isbn=0-304-35730-8|pages=[https://archive.org/details/cassellschronolo0000will/page/333 333–334]}}</ref>
** The [[spinning mule]] is perfected by [[Lancashire]] inventor [[Samuel Crompton]].<ref name="Cassell's Chronology333334"/>
** [[Boulton and Watt]]'s  ''[[Smethwick Engine]]'', now the oldest working engine in the world, is brought into service ([[May]])).
* A joint Spanish-Portuguese survey of the [[Amazon basin]] begins to determine the boundary between the colonial possessions in South America; it continues until [[1795]].
</onlyinclude>