"The repairs of the Mint, which you were pleased to authorize, are now nearly completed. A substantial brick building has been erected on the site formerly occupied by an old wooden building; and in the apparatus and arrangement of machinery, which have been adopted, many important improvements have been introduced. Among these is the substitution of a steam-engine, for the horse-power heretofore employed. A change which it is believed, will not only diminish the expenses of the establishment, but greatly facilitate all its principal operations."