1707 Acts of Union comes into force, uniting England and Scotland to form the United Kingdom of Great Britain
1753 Publication of Species Plantarum by Linnaeus, and the formal start date of plant taxonomy adopted by the International Code of Botanical Nomenclature
1841 First emigrant wagon train leaves Independence, Missouri, for California
1886 US general strike for 8-hour working day begins
1931 Empire State Building opens in New York City
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