What happened December 1884 AD

Díaz had ruled continuously since 1884. The question of presidential succession was an issue as early as 1900, when Díaz turned 70. It was his "undeclared intention to step down from the presidency in 1904."

On December 4, 1884, with the help of the Japanese minister Takezoe Shinichiro who promised to mobilize Japanese legation guards to provide assistance, the reformers staged their coup under the guise of a banquet hosted by Hong Yeong-sik, the director of the General Postal Administration. The banquet was to celebrate the opening of the new national post office. King Gojong was expected to attend together with several foreign diplomats and high-ranking officials, most of whom were members of the pro-Chinese Sadaedang faction. Kim Ok-gyun and his comrades approached King Gojong falsely stating that Chinese troops had created a disturbance and escorted him to the small Gyoengu Palace, where they placed him in the custody of Japanese legation guards. They then proceeded to kill and wound several senior officials of the Sadaedang faction. Consequently, within three days, even before the reform measures were made public, the coup was suppressed by the Chinese troops who attacked and defeated the Japanese forces and restored power to the pro-Chinese Sadaedang faction.

Tesla had been working at the Machine Works for a total of six months when he quit. What event precipitated his leaving is unclear. It may have been over a bonus he did not receive, either for redesigning generators or for the arc lighting system that was shelved. Tesla had previous run-ins with the Edison company over unpaid bonuses he believed he had earned. In his autobiography, Tesla stated the manager of the Edison Machine Works offered a $50,000 bonus to design "twenty-four different types of standard machines" "but it turned out to be a practical joke".[51] Later versions of this story have Thomas Edison himself offering and then reneging on the deal, quipping "Tesla, you don't understand our American humor".[52][53] The size of the bonus in either story has been noted as odd since Machine Works manager Batchelor was stingy with pay and the company did not have that amount of cash (equivalent to $12 million today) on hand. Tesla's diary contains just one comment on what happened at the end of his employment, a note he scrawled across the two pages covering 7 December 1884, to 4 January 1885, saying "Good bye to the Edison Machine Works".