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The general function of the Assay Commission was to examine the gold and silver coins of the Mint and ensure they met the proper specifications.[43] Assay commissioners were placed on one of three committees in most years: the Counting, Weighing, and Assaying Committees. The Counting Committee verified that the number of each type of coin in packets selected from the pyx matched what Mint records said should be there. The Weighing Committee measured the weight of coins from the pyx, checking them against the weight required by law. The Assaying Committee worked with the Philadelphia Mint's assayer as he measured the precious metal content of some of the coins.[44] In some years there was a Committee on Resolutions—in 1912, it urged that a leaflet be published for visitors to the Mint's coin collection, and that a medal be struck to commemorate the collection. The full Assay Commission adopted that committee's report.[45] Congress in 1828 had required that the weights kept by the Mint Director be tested for accuracy in the presence of the assay commissioners each year.[46] By statute passed in 1911, the commission was required to inspect the weights and balances used in assaying at the Philadelphia Mint, and to report on their accuracy.[47] This included the government's official standard pound weight that had been brought from the United Kingdom.[20][48] According to a description of the 1948 meeting, silver coins selected for assay were first placed between steel rollers until the thickness was reduced to .0001 inches (0.0025 mm), and then were chopped into fine pieces and dissolved in nitric acid. The fineness of the silver in the coin could be determined by the amount of salt solution needed to precipitate all the silver in the li |
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