On January 17, 1887, successful American businessman Jonas Gilman Clark announced his intention to found and endow a university in the city of Worcester, filing a petition in the Massachusetts Legislature requesting a charter for Clark University. An Act of Incorporation was duly enacted by the legislature and signed by the governor on March 31 of that same year. Clark, who was a friend of Leland Stanford, was probably inspired by the plans for Stanford University and founded the university with an endowment of one million dollars, and later added another million dollars because he feared the university might someday face a lack of funds. Opening on October 2, 1889, Clark was the first all-graduate university in the United States, with departments in mathematics, physics, chemistry, biology, and psychology.