In the report of Mr. Secretary Bancroft, made to the Senate on the 2d March, 1846, the total effective steam navy of Great Britain was stated, at that time, to consist of one hundred and ninety-nine vessels, of all classes; that of France numbered fifty-four; that of Russia, without the Caspian fleet, thirty-two; while the steam navy of the United States could boast of but six small vessels, and one in process of building; and of these one was for harbor defence, and another a steam-tug. Since that time, however, Congress has provided for the building of four war steamers, and for the establishment of several lines of steamships engaged in carrying the mails, consisting of seventeen large vessels, suitable for war purposes, and at all times liable to be taken for the public service. Of these latter, nine will run between New York and European ports; five between New York and Chagres; and three between Panama and San Francisco. Notwithstanding this increase in our force, it has by no means kept pace with that of other great commercial nations. The American Almanac for the present year estimates the steam navy of France at sixty-four steam vessels of war, besides a reserved force of ten steam frigates now ready, and six corvettes and six small vessels nearly ready. The French Government has also resolved to follow the example of England in establishing lines of steamers, built so as to be easily converted into ships of war, to be employed in commerce and for carrying mails, but being at all times subject to the requisition of the Government. England, also, has added largely to her steam navy, and has increased her lines of mail steamers, giving evidence that she, at least, considers this the best and cheapest mode of providing in time of peace for the exigences of war. On this subject the committee refer to the following facts, for which they are indebted to the remarks of the Hon. T. Butler King, of Georgia, made in the House of Representatives, February 19, 1848.