adherents argued, increase the nation's prosperity. Critics contended that the inflation which would follow the introduction of such a policy would harm workers, whose wages would not rise as fast as prices would, and the operation of Gresham's law would drive gold from circulation, effectively placing the United States on a silver standard. Early attempts toward free silver To advocates of what became known as free silver, the 1873 act became known as the "Crime of '73". Pro-silver forces, with congressional leaders such as Missouri Representative Richard P. Bland, sought the passage of bills to allow depositors of silver bullion to receive it back in the form of coin. Such bills, sponsored by Bland, passed the House of Representatives in 1876 and 1877, but both times failed in the Senate. A third attempt in early 1878 again passed the House, and eventually both houses after being amended in the Senate. The bill, as modified by amendments sponsored by Iowa Senator William B. Allison, did not reverse the 1873 provisions, but required the Treasury to purchase a minimum of $2 million of silver bullion per month; the profit, or seignorage from monetizing the silver was to be used to purchase more silver bullion. The silver would be struck into dollar coins to be circulated, or else stored and used as backing for silver certificates. The Bland–Allison Act was vetoed by President Rutherford B. Hayes, but was enacted by Congress over his veto on February 28, 1878. Implementation of the Bland–Allison Act did not end calls for free silver. The 1880s saw a steep decline in the prices of grain and other agricultural commodities. Silver advocates argued that this dropoff, which caused the price of grain to fall below its cost of production, was caused by the failure of the government to adequately increase the money supply, which had remained steady on a per capita basis. Advocates of the gold standard attributed the decline to advances in production and transportation. The late 19th century saw divergent views in economics as the laissez-faire orthodoxy was questioned by younger economists, and both sides found ample support for their views from theorists. In 1890, the Sherman Silver Purchase Act greatly increased government purchases of silver. The government pledged to stand behind the silver dollars and treasury notes issued under the act by redeeming them in gold. Pursuant to this promise, government gold reserves dwindled over