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United States be, and he is hereby, authorized to cause the navigation of the Ohio river to be improved over the following sand bars, or either of them, at his discretion, to wit: the sand bar which crosses said river, one mile and a quarter below Flint Island; the sand bar two miles above French Island; the bar just below Henderson; the bar below Straight Island; the bar below Willow Island, in the Mississippi bend; and the bar opposite to lower Smithland, below Cumberland Island; and, for the purpose of ascertaining and directing the best method of carrying the provisions of this act into effect, he may employ any of the engineers in the public service which he may deem proper: Provided, nevertheless, That two experiments shall first be made upon two of the said bars, and if in his judgment they shall be successful, then, and not otherwise, he is hereby authorized to cause improvements to be made upon the remaining bars.

. And be it further enacted, That, for the purpose of improving the navigation of the Mississippi river, from the mouth of the Missouri to New Orleans, and of the Ohio river from Pittsburg to its junction with the Mississippi, the President of the United States is hereby authorized to take prompt and effectual measures for the removal of all trees which may be fixed in the bed of said river; and, for this purpose, he is authorized to procure and provide, in that way which in his discretion may be most eligible, the requisite water craft, machinery, implements, and force, to raise all such trees, commonly called “planters, sawyers, or snags,” as may be found in the current of the said rivers at the lowest stage of water, and to saw or cut them off, as near as practicable to the bottom of the stream; and where trees are found upon sand bars, upon the points of islands, or near the bank of the river, which may, at the lowest stage of the water, endanger the safety of navigating said rivers, they shall in like manner be cut, removed, or sawed off; and all roots or limbs, belonging to those parts of said trees, which are fastened in the earth, shall be carefully cut away.

. And be it further enacted, That, for the purpose of carrying into effect the provisions of this act, the sum of seventy-five thousand dollars be, and is hereby, appropriated. And the President of the United States is hereby authorized to draw, from time to time, on the treasury, for such parts, or at any one time for the whole, of said sum, as he shall judge the service requires; which said sum shall be paid out of any money in the treasury not otherwise appropriated.

. And be it further enacted, That the President be, and he is hereby, requested to cause to be laid before Congress, as soon as convenience will permit after the commencement of each session, a statement of the proceedings under this act, that Congress may be enabled to adopt such further measures as may, from time to time, be necessary under existing circumstances.

, May 24, 1824.

Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That, for the purpose of providing funds to discharge the awards of the commissioners under the treaty with Spain, of the twenty-second day of February, in the year of our Lord one thousand eight hundred and nineteen, the Secretary of the Treasury be, and he is hereby, authorized, with the approbation of the President of the United States, to cause to be issued and sold to the