Whilst the interests of agriculture, of commerce, and of navigation have been enlarged and invigorated, it is highly gratifying to observe that our manufactures are also in a prosperous condition.  None of the ruinous effects upon this interest which were apprehended by some as the result of the operation of the revenue system established by the act of 1846 have been experienced.  On the contrary, the number of manufactories and the amount of capital invested in them is steadily and rapidly increasing, affording gratifying proofs that American enterprise and skill employed in this branch of domestic industry, with no other advantages than those fairly and incidentally accruing from a just System of revenue duties, are abundantly able to meet successfully all competition from abroad and still derive fair and remunerating profits.  While capital invested in manufactures is yielding adequate and fair profits under the new system, the wages of labor, whether employed in manufactures, agriculture, commerce, or navigation, have been augmented.  The toiling millions whose daily labor furnishes the supply of food and raiment and all the necessaries and comforts of life are receiving higher wages and more steady and permanent employment than in any other country or at any previous period of our own history.

So successful have been all branches of our industry that a foreign war, which generally diminishes the resources of a nation, has in no essential degree retarded our onward progress or checked our general prosperity.

With such gratifying evidences of prosperity and of the successful operation of the revenue act of 1846, every consideration of public policy recommends that it shall remain unchanged.  It is hoped that the system of impost duties which it established may be regarded as the permanent policy of the country, and that the great interests affected by it may not again be subject to be injuriously disturbed, as they have heretofore been by frequent and sometimes sudden changes.

For the purpose of increasing the revenue, and without changing or modifying the rates imposed by the act of 1846 on the dutiable articles embraced by its provisions, I again recommend to your favorable consideration the expediency of levying a revenue duty on tea and coffee.  The policy which exempted these articles from duty during peace, and when the revenue to be derived from them was not needed, ceases to exist when the country is engaged in war and requires the use of all of its available resources.  It is a tax which would be so generally diffused among the people that it would be felt oppressively by none and be complained of by none.  It is believed that there are not in the list of imported articles any which are more properly the subject of war duties than tea and coffee.

It is estimated that $3,000,000 would be derived annually by a moderate duty imposed on these articles.

Should Congress avail itself of this additional source of revenue, not only would the amount of the public loan rendered necessary by the war with Mexico be diminished to that extent, but the public credit and the public confidence in the ability and determination of the Government to meet all its engagements promptly would be more firmly established, and the reduced amount of the loan which it may be necessary to negotiate could probably be obtained at cheaper rates.