THE

NORMAL

UNION ARITHMETIC,

GRADED COURSE.

PART III.

BY

EDWARD BROOKS, A. M., PH. D.,

PRINCIPAL AND PROFESSOR OF MATHEMATICS IN PENNSYLVANIA STATE NORMAL
SCHOOL, AND AUTHOR OF "THE NORMAL SERIES OF ARITHMETICS," "NORMAL
ELEMENTARY ALGEBRA," "NORMAL GEOMETRY AND TRIGONOMETRY,"
"PHILOSOPHY OF ARITHMETIC," ETC.

"Analysis and Synthesis;-the magic wand whose touch unfolds the mysterious and
beautiful relations of numbers."

PHILADELPHIA:

SOWER, POTTS & COMPANY,
530 MARKET ST., AND 523 MINOR ST.