Deficiency appropriation required by the Isthmian Canal Commission for labor. Letter from the Secretary of the Treasury, transmitting copy of a communication of the Secretary of War of the 16th instant submitting an urgent deficiency appropriation required by the Isthmian Canal Commission for the current fiscal year under item 4 of the appropriations made by the Sundry Civil Act of June 23, 1913, being for skilled and unskilled labor on the Isthmus, etc., $2,250,000.