NORMAL UNION ARITHMETIC, DESIGNED FOR COMMON SCHOOLS, NORMAL SCHOOLS, HIGH SCHOOLS, BY EDWARD BROOKS, A. M., PH. D., SUPERINTENDENT OF PUBLIC SCHOOLS OF PHILADELPHIA, FORMER PRINCIPAL OF STATE NORMAL SCHOOL, PENNSYLVANIA, AND AUTHOR ALGEBRA, ," "NORMAL GEOMETRY AND TRIGONOMETRY," "NOR- "Analysis and Synthesis ;-the magic wand whose touch unfolds the mys PHILADELPHIA: CHRISTOPHER SOWER CO., 614 ARCH STREET. |