Robson Vivian E. The Radix System

Philadelphia, Pennsylvania: J.B. Lippincott, 1930. — 111 p.The great interest shown in directional methods of astrology, and the increasing popularity of the Radix System, rendered a separate work upon this subject. The book is divided in the following sections: directional chart; major directions; minor directions; example reading; cuspal reading; cuspal directions; minor directional chart; parallels and midpoints; converse directions; some final hints; effects of directions; with a table of major and minor arcs. The Radix System was first introduced by Sepharial and Robson's work is based on the same principle.