An Act amending the act of July 8, 1957 (P. L. 579, No. 321), entitled, as amended, "An act establishing minimum compensation and increments for members of the faculty and administration of the Thaddeus Stevens Trade School, providing leave of absence with pay for faculty members and the superintendent of the school and imposing duties on the Board of Trustees of such school and the Superintendent of Public Instruction," changing the name of the school.