The estimated expenditures during the next fiscal year, ending 30th June, 1861, are $66,714,928.79. Of this amount $3,386,621.34 will be required to pay the interest on the public debt, leaving the sum of $63,328,307.45 for the estimated ordinary expenditures during the fiscal year ending 30th June, 1861. Upon these estimates a balance will be left in the Treasury on the 30th June, 1861, of $13,891,879.61. But this balance, as well as that estimated to remain in the Treasury on the 1st July, 1860, will be reduced by such appropriations as shall be made by law to carry into effect certain Indian treaties during the present fiscal year, asked for by the Secretary of the Interior, to the amount of $539,350; and upon the estimates of the postmaster-General for the service of his Department the last fiscal year, ending 30th June, 1859, amounting to $4,296,009, together with the further estimate of that officer for the service of the present fiscal year, ending 30th June, 1860, being $5,526,324, making an aggregate of $10,361,683. Should these appropriations be made as requested by the proper Departments, the balance in the Treasury on the 30th June, 1861, will not, it is estimated, exceed $3,530,196.61. I transmit herewith the reports of the Secretaries of War, of the Navy, of the Interior, and of the postmaster-General. They each contain valuable information and important recommendations well worthy of the serious consideration of Congress. It will appear from the report of the Secretary of War that the Army expenditures have been materially reduced by a system of rigid economy, which in his opinion offers every guaranty that the reduction will be permanent. The estimates of the Department for the next have been reduced nearly $2,000,000 below the estimates for the present fiscal year and $500,000 below the amount granted for this year at the last session of Congress. The expenditures of the Post-Office Department during the past fiscal year, ending on the 30th June, 1859, exclusive of payments for mail service specially provided for by Congress out of the general Treasury, amounted to $14,964,493.33 and its receipts to $7,968,484.07, showing a deficiency to be supplied from the Treasury of $6,996,009.26, against $5,235,677.15 for the year ending 30th June, 1858. The increased cost of transportation, growing out of the expansion of the service required by Congress, explains this rapid augmentation of the expenditures. It is gratifying, however, to observe an increase of receipts for the year ending on the 30th of June, 1859, equal to $481,691.21 compared with those in the year ending on the 30th June, 1858.