Editing 1890 (section)

=== July–September ===
* [[July 1]]
** [[Heligoland–Zanzibar Treaty]]: Britain cedes the [[Heligoland]] islands (in the [[German Bight]]) to Germany, in return for protectorates over [[Wituland]] and the [[Sultanate of Zanzibar]] (the islands of [[Pemba Island|Pemba]] and [[Unguja]]) in east Africa.<ref name=CBH>{{Cite book|last1=Palmer|first1=Alan|last2=Palmer |first2=Veronica|year=1992|title=The Chronology of British History|publisher=Century Ltd|location=London|pages=317–318|isbn=0-7126-5616-2}}</ref>
** [[1890 Japanese general election]]: In the first general election for the [[House of Representatives of Japan]], about 5% of the adult male population elect a lower house of the [[Diet of Japan]], in accordance with the new [[Meiji Constitution]] of [[1889]].
** The [[Ouija]] board is first released by [[Elijah Bond]].
* [[July 2]] – The [[Sherman Antitrust Act]] and [[Sherman Silver Purchase Act]] become United States law.
* [[July 3]] – [[Idaho]] is admitted as the 43rd [[U.S. state]].
* [[July 10]] – [[Wyoming]] is admitted as the 44th [[U.S. state]].
* [[July 13]] – In [[Minnesota]], storms result in the [[Sea Wing disaster|''Sea Wing'' disaster]] on [[Lake Pepin]], killing 98.
* [[July 26]] – In [[Buenos Aires]], the [[Revolution of the Park]] takes place, forcing President [[Miguel Ángel Juárez Celman|Juárez Celman]]'s resignation.
* [[July 27]] – [[Death of Vincent van Gogh]]: van Gogh shoots himself, dying two days later.
* [[August 6]] – At [[Auburn Correctional Facility|Auburn Prison]] in New York, [[William Kemmler]] becomes the first person to be [[Capital punishment|executed]] in the [[electric chair]].
* [[August 20]] – [[Treaty of London (1890)|Treaty of London]]: Portugal and the United Kingdom define the borders of the Portuguese colonies of [[Portuguese Mozambique|Mozambique]] and [[Portuguese Angola|Angola]].
* [[August 23]] – The [[BOVESPA]] stock exchange is founded in [[São Paulo]], Brazil.
* [[August]] – Kaiser [[Wilhelm II, German Emperor|Wilhelm II]] and Tsar [[Alexander III of Russia|Alexander III]] meet at [[Narva]].
* [[September 6]] – [[Dublin]] [[association football]] club [[Bohemian F.C.]] is founded in the Gate Lodge, [[Phoenix Park]].
* [[September 12]] – [[Salisbury, Rhodesia]], is founded.
* [[September 19]] – The [[University of North Texas]] is founded, as the Texas Normal College and Teacher Training Institute.<ref>{{Cite web|url=https://125.unt.edu/history/history-unt|title=History of UNT {{!}} 125th Anniversary|website=125.unt.edu|language=en|access-date=2017-04-05}}</ref>
* [[September 25]] — President [[Wilford Woodruff]] of [[the Church of Jesus Christ of Latter-day Saints]] issues the [[1890 Manifesto]] ending the official practice of polygamy.