AN ORDINANCE AUTHORIZING HIS HONOR, THE MAYOR, TO NEGOTIATE FOE THE ACQUISITION BY THE CITY OF MANILA OF LOT NO. 15-A, OWNED BY THE NATIONAL GOVERNMENT AND CONTINOUS TO THE MANILA SCIENCE HIGH SCHOOL CONTAINING AN AREA OF 2,735 SQUARE METERS, MORE OR LESS AND VALUED AT P 2,462,000.00 FOR THE USE OF SAID SCHOOL, AND FOR OTHER PURPOSES,