In addition to this sum the Postmaster-General will require from the Treasury for the service of the Post-Office Department $3,838,728, as explained in the report of the Secretary of the Treasury, which will increase the estimated deficit on June 30, 1860, to $7,914,576.89. To provide for the payment of this estimated deficiency, which will be increased by such appropriations as may be made by Congress not estimated for in the report of the Treasury Department, as well as to provide for the gradual redemption from year to year of the outstanding Treasury notes, the Secretary of the Treasury recommends such a revision of the present tariff as will raise the required amount. After what I have already said I need scarcely add that I concur in the opinion expressed in his report--that the public debt should not be increased by an additional loan--and would therefore strongly urge upon Congress the duty of making at their present session the necessary provision for meeting these liabilities. The public debt on July 1, 1858, the commencement of the present fiscal year, was $25,155,977.66. During the first quarter of the present year the sum of $10,000,000 has been negotiated of the loan authorized by the act of June 14, 1858, making the present outstanding public debt, exclusive of Treasury notes, $35,155,977.66. There was on the 1st of July, 1858, of Treasury notes issued by authority of the act of December 23, 1857, unredeemed, the sum of $19,754,800, making the amount of actual indebtedness at that date $54,910,777.66. To this will be added $10,000,000 during the present fiscal year, this being the remaining half of the loan of $20,000,000 not yet negotiated. The rapid increase of the public debt and the necessity which exists for a modification of the tariff to meet even the ordinary expenses of the Government ought to admonish us all, in our respective spheres of duty, to the practice of rigid economy. The objects of expenditure should be limited in number, as far as this may be practicable, and the appropriations necessary to carry them into effect ought to be disbursed under the strictest accountability. Enlightened economy does not consist in the refusal to appropriate money for constitutional purposes essential to the defense, progress, and prosperity of the Republic, but in taking care that none of this money shall be wasted by mismanagement in its application to the objects designated by law.