The Mint began work in Philadelphia in 1792, and its first products were experiments. The coinage law of April 2, 1792 called for a cent of 264 grains of pure copper, a coin so heavy that Thomas Jefferson favored adding a little silver to bring a smaller cent up to its metal value. The result was the silver-center cent, a small copper disc with a silver plug in the middle, and a solid companion in copper or billon. Beside it came the Birch cents, signed BIRCH on the bust, which uspatterns.com sees as the forerunner of the large cent, a disme (ten-cent piece) in silver and copper, and Joseph Wright's quarter dollar with an eagle on a globe. The silver half dismes of July 1792, struck in John Harper's workshop before the Mint's own building was ready, are listed by Judd as patterns but went into circulation, and NumisDex keeps them in their own 1792 half disme series.
From 1794 to about 1800 most of what Judd lists are die trials: regular dies for half dimes, half dollars, dollars, half eagles and eagles tried out in copper before the precious metal was struck. Several 1794 and 1795 half dollar trials were cut down and reused as half cent planchets. Then the record goes quiet for three decades, and the pieces dated 1803 to 1823 are mostly later inventions, struck from old dies long after their dates.
A second burst of experiment began in 1836, when Director Robert M. Patterson set out to renew the coinage. Christian Gobrecht, then the second engraver, prepared a silver dollar with a seated Liberty and a flying eagle, a gold dollar with a Liberty cap in rays, and, with refiner Franklin Peale, a billon two-cent piece that was dropped when Peale showed how easily it could be counterfeited. In 1838 and 1839 the Mint tried a run of half dollar designs, William Kneass's draped Liberty head and Gobrecht's seated Liberty among them, before settling on the seated figure for silver coinage.
The California gold of 1848 brought new denominations. Congress authorized a gold dollar and a double eagle in March 1849, and Chief Engraver James B. Longacre cut the patterns for both; the only confirmed 1849 double eagle is in the Smithsonian. In January 1849 Representative Samuel Vinton asked the Mint about a three-cent coin, and the first three-cent patterns paired a half dime obverse with a reverse showing only 3 or III. The 1850s were the decade of the small cent: ring cents with a center hole in 1850 and 1851, cents in German silver and copper-nickel from 1853, Liberty head and flying eagle cents in 1854 and 1855, the 1856 Flying Eagle cent given to members of Congress before the small cent was authorized in February 1857, and in 1858 a dozen cent designs, including the Indian head adopted for 1859. The era closes with Anthony Paquet's seated Liberty and the "French head" half dollars of 1859 and the transitional dime and half dime that lack the words UNITED STATES OF AMERICA.









































