Sherman Silver Purchase Act, 1890, passed by the U.S. Congress to supplant the Bland-Allison Act of 1878. It not only required the U.S. government to purchase nearly twice as much silver as before, but also added substantially to the amount of money already in circulation. The Sherman Silver Purchase Act (supported by John Sherman only as a compromise with the advocates of free silver) threatened, when put into operation, to undermine the U.S. Treasury's gold reserves. After the panic of 1893 broke, President Cleveland called a special session of Congress and secured (1893) the repeal of the act.