On This Day, Oct. 27: Pinckney's Treaty settles Florida border, Mississippi River rights - UPI.com

Oct. 27 (UPI) -- On this date in history:

In 1682, the city of Philadelphia was founded by William Penn to serve as the capital of the Pennsylvania Colony.

In 1787, a New York newspaper published the first of 77 essays explaining the new Constitution and urging its ratification. The essays were written by Alexander Hamilton, James Madison and John Jay (and later combined as "The Federalist Papers)."

In 1795, Pinckney's Treaty with Spain settled Florida's northern boundary and gave navigation rights on the Mississippi River to the United States. The agreement is also known as the Treaty of San Lorenzo and the Treaty of Madrid. Florida became a U.S. territory in 1822 and a state in 1845.

In 1904, the first rapid transit subway system in America opened in New York City.