Originally printed serially in the early 1920's by an Esoteric order, this magnificent work is the product of the Masonic Rosicrucian movement that permeated the early 20th century. Dr. Mayer 320, IX0, was a Masonic historian and Rosicrucian adept who devoted many years in accumulating the material needed to write this in-depth analysis of the 47th Proposition of Euclid. This work includes an examination of Pythagorean numerology and that of the Platonist which ties the whole Proposition into the Tracing Board of the Grand Architect. The basic formula of the 3, 4, 5 is illustrated in the Heavens as well as being a simple formula of construction. This book is written for the Masonic and Rosicrucian student who desires to discover the Divine Truths inherent in this Great Problem.