139 IN A CIRCUMFERENCE INDICATED IN THE SQUARE PLAN INSCRIBE THE OCTAGONAL ROSETTE. EXTENDED SIDES DETERMINE THE PERFECT OCTAGONS.
140 SQUARE PLAN. OCTAGONAL AND SQUARE DISTRIBUTION. TWO ROSETTES, ONE OF SIXTEEN AND ONE OF EIGHT POINTS. THE DIAGONALS FROM THE ANGLES OF THE PENTAGON COMPLETE THE ROSETTE OF SIXTEEN POINTS, AND THE EXTENDED SIDES OF THE PENTAGON DETERMINE THE OCTAGONAL ROSETTE.
141 SQUARE PLAN. NET-WORK OF THE OCTAGON AND SQUARE ASSEMBLED. DESCRIBE CIRCUMFERENCES AS IN THE PLAN. IN JOINING THE POINTS OF DIVISION, THERE IS ON THE ONE PART THE HEXAGON, AND ON THE OTHER PART THE ROSETTE OF SIXTEEN POINTS. THE tricèle révolvé ASSISTS IN ELUCIDATING THE NET-WORK.