Solar Arc Directions, Predictive Astrology, and Applied Astrology. This archival document is an instructional reference guide titled “SOLAR ARC DIRECTIONS” by Marion D. March. March outlines the mathematical calculations and practical applications of Solar Arc Directions, secondary progressions, and planetary transits. She distinguishes progressions as internal attitudinal shifts, directions as visible outer developments, and transits as concrete environmental triggers, recommending a combined approach in practice. The text includes step-by-step mathematical instructions for calculating True Solar Arc increments, illustrated by a case study of author Kitty Kelley across key career and life milestones. Additionally, March details planetary orbital speeds and presents a four-quadrant cyclic model structured around the chart angles to track long-term personal and vocational development.