A movement is on foot to procure from Congress the necessary appropriations for the deepening of the channels at Boston, so as to admit vessels of the largest class. A depth of 30 feet is necessary, while at present only from 23 to 27 feet at mean low water are available. Boston is now one of our most important shipping ports and enjoys a great and growing commerce. There should be no delay in granting the most liberal appropriations for a work at once so necessary and advantageous to the whole country.