Editing 1878 (section)

===July&ndash;September===
[[File:Europe 1878 map en.png|thumb|Europe after the [[Congress of Berlin]] in 1878 and the territorial and political rearrangement of the Balkan Peninsula.]]
* [[July 4]] &ndash; A [[Ten Broeck – Mollie McCarty match race|match race]] between champion thoroughbred racehorses [[Ten Broeck (horse)|Ten Broeck]] and [[Mollie McCarty]] draws more than 30,000 fans to Louisville, and inspires the folk song, "[[Molly and Tenbrooks]]".
* [[July 13]] &ndash; The [[Treaty of Berlin (1878)|Treaty of Berlin]] makes [[Serbia]], [[Montenegro]] and [[Romania]] completely independent, confirms the autonomy of [[Bulgaria]], makes [[Cyprus]] a British possession, and allows Austria-Hungary to garrison the [[Bosnia Vilayet]].
* [[August 9]] &ndash; The [[Wallingford Tornado of 1878]], the deadliest [[tornado]] in [[Connecticut]] history, destroys the town of [[Wallingford, Connecticut|Wallingford]], killing 34 people and injuring more than 70.
* [[August 26]] &ndash; [[Uyedineniya Island]] is discovered in the [[Kara Sea]], by [[Norwegians|Norwegian]] explorer Captain Edvard Holm Johannesen.
* [[September 3]] &ndash; Over 640 die when the crowded pleasure boat {{SS|Princess Alice|1865|2}} collides with the ''[[SS_Bywell_Castle_(1869)|Bywell Castle]]'' in the [[River Thames]].
* [[September 12]] &ndash; [[Cleopatra's Needle (London)|Cleopatra's Needle]] is erected beside the Thames in London, having arrived in England on [[January 21]].
* [[September 17]] &ndash; [[1878 Canadian federal election]]: Sir [[John A. Macdonald]] and his [[Conservative Party of Canada (1867–1942)|Conservative Party]] are returned to power, defeating the incumbent [[Liberal Party of Canada|Liberal Party]], led by [[Alexander Mackenzie (politician)|Alexander Mackenzie]].
* [[September 20]] &ndash; ''[[The Hindu]]'', an Indian newspaper, is founded.