The Old Copper cents.
--In November last the Directors of the mint at Philadelphia made an arrangement with the Adams Express Company, to convey to the mint, free of charge, all old cents to be exchanged for new ones. On the 20th of last month this arrangement was brought to a close. During this time (about three months) there have been received and exchanged, at the mint, 5,400,000 cents, ($54,000)--1,100,000 ($11,000) were sent from Boston and the East.