According to the writings of Vitruvius, the Greek mathematician Archimedes created a primitive elevator in 236 B.C. that was operated by hoisting ropes wound around a drum and rotated by manpower applied to a capstan. In ancient Rome, a subterranean complex of rooms, animal pens and tunnels stood beneath the Colosseum. At various intervals, elevators powered by hundreds of men using winches and counterweights brought gladiators and large animals up through vertical shafts into the arena for battle.
In 1743, Louis XV had what was referred to as a “flying chair” built to allow one of his mistresses to access her quarters on the third floor of the Palace of Versailles. Similarly, a “flying table” in his retreat château de Choisy allowed the king and his private guests to dine without intrusion from the servants. At the sound of a bell, a table would rise from the kitchen below into the dining room with an elaborate meal, including all of the necessary accoutrements.
By the mid-19th century, elevators powered by steam or water were available for sale, but the ropes they relied upon could be worn out or destroyed and were not, therefore, generally trusted for passenger travel. However, in 1852, Elisha Graves Otis invented a safety break that revolutionized the vertical transport industry. In the event that an elevator’s hoisting rope broke, a spring would operate pawls on the car, forcing them into position with racks at the sides of the shaft and suspending the car in place. Installed in a five-story department store in New York City in 1857, Otis’ first commercial passenger elevator soon changed the world’s skyline, making skyscrapers a practical reality and turning the most valuable real estate on its head—from the first floor to the penthouse.
Answer:
B. A U.S. warship was attacked by the Viet Cong.
Explanation:
The Gulf of Tonkin incident (Vietnamese: Sự kiện Vịnh Bắc Bộ), also known as the USS Maddox incident, was an international confrontation that led to the United States engaging more directly in the Vietnam War. It involved both a proven confrontation on August 2, 1964 and a claim of a second confrontation on August 4, 1964 between ships of North Vietnam and the United States in the waters of the Gulf of Tonkin. The original American report blamed North Vietnam for both incidents, but the Pentagon Papers, the memoirs of Robert McNamara, and NSA publications from 2005 suggest that the dismissal of legitimate concerns regarding the truthfulness of the second incident by the Department of State and other government personnel was used to justify an escalation by the US to a state of war against North Vietnam.
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One of the important elements of his presidency was the Square Deal policy. ... Roosevelt's progressive ideas and his Square Deal Policy in relation to Control of the Corporations were demonstrated during the Anthracite Coal Strike of 1902 saw President Roosevelt act as a mediator during the bitter dispute.
There were three types of British colonies: royal, proprietary, and self-governing. Each type had its own characteristics.
The correct answer is A) on Union soil.
The Battle of Antietam/Sharpsburg is different from previous battles in the Civil War because it was the first battle on Union soil.
During the times of the American Civil War, the Battle of Antietam was fought on September 17, 1862, in Sharpsburg, Maryland. It was a hard-fought bloody battle that was decided in the end with a sound victory to the Union Army led by General George McClellan. Confederate leader Robert E. Lee was trying to invade the Union's territory, but a solid Army of the Potomac impeeded it.
