Email Record: Supplemental estimate of appropriation for District of Columbia. Letter from the Secretary of the Treasury, transmitting copy of a communication from the Board of Commissioners of the District of Columbia, submitting a supplemental estimate of appropriation, in the sum of $12,800, required by the District of Columbia for purchase of fire apparatus urgently needed, in addition to the amount appropriated therefor in the District of Columbia appropriation act approved August 31, 1918.