Big Apple
Although the history of "Big Apple " was once thought a mystery, a clearer picture of the term's history has emerged due to the work of amateur etymologist Barry Popik, and Gerald Cohen of Missouri University of Science and Technology. A number of false theories had previously existed, including a claim that the term derived from a woman named Eve who ran a brothel in the city. This was subsequently exposed as a hoax.
History of New York City
During the 19th century, the city was transformed by immigration, a visionary development proposal called the Commissioners' Plan of 1811 which expanded the city street grid to encompass all of Manhattan, and the opening of the Erie Canal in 1825, which connected the Atlantic port to the vast agricultural markets of the Midwestern United States and Canada. By 1835, New York City had surpassed Philadelphia as the largest city in the United States. New York grew as an economic center, first as a result of Alexander Hamilton's policies and practices as the first Secretary of the Treasury.