A considerable increase of domestic manufactures, by diminishing the importation of foreign, will probably tend to lessen the amount of the public revenue. As, however, a large proportion of the revenue which is derived from duties is raised from other articles than manufactures, the demand for which will increase with our population, it is believed that a fund will still be raised from that source adequate to the greater part of the public expenditures, especially as those expenditures, should we continue to be blessed with peace, will be diminished by the completion of the fortifications, dock yards, and other public works, by the augmentation of the Navy to the point to which it is proposed to carry it, and by the payment of the public debt, including pensions for military services. It can not be doubted that the more complete our internal resources and the less dependent we are on foreign powers for every national as well as domestic purpose the greater and more stable will be the public felicity. By the increase of domestic manufactures will the demand for the rude materials at home be increased, and thus will the dependence of the several parts of our Union on each other and the strength of the Union itself be proportionably augmented. In this process, which is very desirable, and inevitable under the existing duties, the resources which obviously present themselves to supply a deficiency in the revenue, should it occur, are the interests which may derive the principal benefit from the change. If domestic manufactures are raised by duties on foreign, the deficiency in the fund necessary for public purposes should be supplied by duties on the former. At the last session it seemed doubtful whether the revenue derived from the present sources would be adequate to all the great purposes of our Union, including the construction of our fortifications, the augmentation of the Navy, and the protection of our commerce against the dangers to which it is exposed. Had the deficiency been such as to subject us to the necessity either to abandon those measures of defense or to resort to the other means for adequate funds, the course presented to the adoption of a virtuous and enlightened people appeared to be a plain one. It must be gratifying to all to know that this necessity does not exist. Nothing, however, in contemplation of such important objects, which can be easily provided for, should be left to hazard. It is thought that the revenue may receive an augmentation from the existing sources, and in a manner to aid our manufactures, without hastening prematurely the result which has been suggested. It is believed that a moderate additional duty on certain articles would have that effect, without being liable to any serious objection.