Editing 1883 (section)

=== April&ndash;June ===
[[File:Brooklyn Bridge Postdlf.jpg|thumb|165px|right| [[May 24]]: [[Brooklyn Bridge]] is opened.]]
* [[April 5]] &ndash; [[Liquid oxygen|Oxygen]] is liquefied for the first time.
* [[April 28]] &ndash; The first [[rugby sevens]] tournament is played at [[Melrose RFC]] in Scotland.<ref>{{cite web|url=http://www.melrose7s.com/index.php?page=history|title=History of melrose sevens|access-date=2014-03-02|archive-date=February 18, 2014|archive-url=https://web.archive.org/web/20140218054032/http://www.melrose7s.com/index.php?page=history|url-status=usurped}}</ref>
* [[May 20]] &ndash; [[1883 eruption of Krakatoa]], [[Indonesia]]
* [[May 23]] &ndash; [[Robert Louis Stevenson]]'s children's pirate adventure novel ''[[Treasure Island]]'' is first published in book format, in London.
* [[May 24]] &ndash; [[Brooklyn Bridge]] is opened to traffic in New York City, after 13 years of construction.
* [[May 30]] &ndash; A rumor that the [[Brooklyn Bridge]] is going to collapse causes a stampede, which crushes 12 people.
* [[June 13]] &ndash; Count [[Arvid Posse]] leaves office as [[Prime Minister of Sweden]]. He is succeeded by [[Carl Johan Thyselius]], the first non-aristocrat (Swedish; "''ofrälse''") to serve as Swedish head of government, and Prime Minister.
* [[June 15]] &ndash; [[Otto von Bismarck]] pushes the first social security law through the [[Reichstag (German Empire)|Reichstag]]. It establishes a system of [[Publicly funded health care]], one of the first worldwide.
* [[June 16]] &ndash; [[Victoria Hall disaster]]: A rush for treats results in 183 children being [[asphyxiated]] in a concert hall in [[Sunderland, Tyne and Wear|Sunderland]], England.
* [[June 28]] &ndash; In [[Milan]], Italy, the first central European electricity [[power station]] is inaugurated.
* [[June 30]] &ndash; [[Robert Louis Stevenson]]'s novel ''[[The Black Arrow]]'' first appears as a serial in the British magazine ''[[Young Folks (magazine)|Young Folks; A Boys' and Girls' Paper of Instructive and Entertaining Literature]]'' as by 'Captain George North'. Stevenson completes writing it at the end of the [[summer]] in France.