98: DIVIDE CIRCUMFERENCES AS IN THE PLAN. FROM THE CENTRE OF THE HEXAGONAL ROSETTE DESCRIBE A CIRCUMFERENCE TANGENT TO THE FIRST, AND DIVIDE INTO TWELVE PARTS. BY THE AID OF THE PENTAGON COMPRISED COMPLETE THE ROSETTE; THEN, DEPENDING ON THE PENTAGON—WHICH, THOUGH IRREGULAR, RULES ALL—TRACE THE PENTAGONAL FIGURE WHICH STANDS ON THE POINTS OF THE ROSETTES.
PLATE LXXXIII.
Mosaics from Various Halls.
99 ISOCELES PLAN. DIVIDE THE SPACE SURROUNDING THE ACUTE APICES OF THE LOZENGE INTO TWENTY EQUAL PARTS, AND OF THE OBTUSE APICES INTO SIXTEEN. IN THE ONE DRAW A STARRED DECAGONAL, AND IN THE OTHER A STARRED OCTAGONAL ROSETTE. THE ADJUSTMENT OF TWO TYPES SO DIFFERENT IS NOT CONSIDERED SUCCESSFUL.