In late 1893, Lenin moved to Saint Petersburg. There, he worked as a barrister's assistant and rose to a senior position in a Marxist revolutionary cell that called itself the "Social-Democrats" after the Marxist Social Democratic Party of Germany.
Heinrich Göbel in 1893 claimed he had designed the first incandescent light bulb in 1854, with a thin carbonized bamboo filament of high resistance, platinum lead-in wires in an all-glass envelope, and a high vacuum. Judges of four courts raised doubts about the alleged Göbel anticipation, but there was never a decision in a final hearing due to the expiry date of Edison's patent. A research work published 2007 concluded that the story of the Göbel lamps in the 1850s is a legend.
By the beginning of 1893, Westinghouse engineer Charles F. Scott and then Benjamin G. Lamme had made progress on an efficient version of Tesla's induction motor. Lamme found a way to make the polyphase system it would need compatible with older single phase AC and DC systems by developing a rotary converter.
The World Parliament of Religions, held in Chicago in 1893, was the landmark event that increased Western awareness of meditation. This was the first time that Western audiences on American soil received Asian spiritual teachings from Asians themselves.
In 1893, a Muslim merchant in Kathiawar named Dada Abdullah contacted Gandhi. Abdullah owned a large successful shipping business in South Africa. His distant cousin in Johannesburg needed a lawyer, and they preferred someone with Kathiawari heritage. Gandhi inquired about his pay for the work. They offered a total salary of £105 plus travel expenses. He accepted it, knowing that it would be at least one-year commitment in the Colony of Natal, South Africa, also a part of the British Empire. In April 1893, Gandhi aged 23, set sail for South Africa to be the lawyer for Abdullah's cousin.
In another version, Antoine Feuchtwanger, or Anton Ludwig Feuchtwanger, served sausages in rolls at the World's Fair – either at the 1904 Louisiana Purchase Exposition in St. Louis, or, earlier, at the 1893 World's Columbian Exposition, in Chicago – again, allegedly because the white gloves provided to customers to protect their hands were being kept as souvenirs.
In 1893 at the Franklin Institute in Philadelphia, Pennsylvania and the National Electric Light Association, Tesla told onlookers that he was sure a system like his could eventually conduct "intelligible signals or perhaps even power to any distance without the use of wires" by conducting it through the Earth.
Westinghouse Electric asked Tesla to participate in the 1893 World's Columbian Exposition in Chicago where the company had a large space in the "Electricity Building" devoted to electrical exhibits. Westinghouse Electric won the bid to light the Exposition with alternating current and it was a key event in the history of AC power, as the company demonstrated to the American public the safety, reliability, and efficiency of an alternating current system that was polyphase and could also supply the other AC and DC exhibits at the fair.
In 1893. the recumbent bicycle was invented, which is a bicycle that places the rider in a laid-back reclining position. Most recumbent riders choose this type of design for ergonomic reasons: the rider's weight is distributed comfortably over a larger area, supported by back and buttocks.
His father wanted him to prepare for a military career and so his last three years at Harrow were in the army form. After two unsuccessful attempts to gain admittance to the Royal Military Academy, Sandhurst, he succeeded on his third. Churchill was accepted as a cadet in the cavalry, starting in September 1893.
In 1893, Edward Dean Adams, who headed up the Niagara Falls Cataract Construction Company, sought Tesla's opinion on what system would be best to transmit power generated at the falls.