A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 343
1019. T)E¥.—The Hadical Axis of Two Circles is the locusof the point whose powers ^vitb respect to tlie two circles are equal. 324 INTRODUCTION TO MODERN GEOMETRY. 1020. I*rojh—Tlte Jiadical Axis of two circles is aright line.
Geometry · Trigonometry
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