New Yorkers have an additional reason to celebrate the 4th of July: The date also marks the emancipation of slaves and abolition of slavery in New York in 1827. Though the state legislature passed prior laws with the goal of gradually emancipating slaves, they were open to abuse. In 1817, the legislature decreed that slavery in New York State and the City was forbidden as of Independence Day, 1827. According to The Encyclopedia of New......