the telephone. March 10 – Alexander Graham Bell makes the first successful telephone call, saying "Mr. Watson, come here, I want to see you". March 20 – Through constitutional reform taking legal effect, Louis De Geer becomes the first Prime Minister of Sweden. April–June April 1 – Lars Magnus Ericsson starts a small mechanical workshop in Stockholm, Sweden (from April 27 partnering with Carl Johan Andersson), dealing with telegraphy equipment, which grows into the worldwide company Ericsson. April 12 – The Indian Act comes into force in Canada. April 16 – The April Uprising in Bulgaria occurs. April 17 – Friends Academy is founded by Gideon Frost at Locust Valley, New York. May – April Uprising (Bulgaria): Batak massacre – Bulgarians in Batak are massacred by Ottoman troops. The number of victims ranges from 3,000 to 5,000, depending on the source. May 1 The Royal Titles Act 1876 in the UK Parliament confers the title 'Empress of India' upon Queen Victoria from 1877. The Settle–Carlisle Railway in England is opened to passenger traffic (it opened to goods traffic in 1875). May 10 The Centennial Exposition begins in Philadelphia. Major pharmaceutical brand Eli Lilly is founded in Indiana, United States. May 11/12 – Berlin Memorandum: Germany, Russia and Austria-Hungary propose an armistice between Turkey and its insurgents. May 16 British Prime Minister Benjamin Disraeli rejects the Berlin Memorandum. German American "Napoleon of crime" Adam Worth steals Gainsborough's Portrait of Georgiana, Duchess of Devonshire from a London gallery three weeks after its sale at Christie's for 10,000 guineas, the highest price ever paid for a painting at auction at this time. It is not recovered until 1901. May 17 – Nicolaus Otto files his patent for the four-stroke cycle internal combustion engine. May 18 – Wyatt Earp starts work in Dodge City, Kansas, serving under Marshal Larry Deger. May 29 – The United States Senate votes 37 to 29 that U.S. Secretary of War William W. Belknap cannot be barred from trial and impeachment, despite being a private citizen. May 30 – Abdülaziz is deposed by his nephew Murad V as Sultan of the Ottoman Empire on the grounds of mismanaging the economy; 6 days later, Abdülaziz is found dead at the Çırağan Palace in Istanbul and 93 days later Murad is deposed by Abdul Hamid II on the grounds of mental illness. June 4 – The Transcontinental Express arrives in San