ranged to fit one of the triangles and then repeated through the entire square. The design would be suitable for a square window grille and may be made of flat iron riveted together, with the frame of thicker stock.
Rules without number have been rehearsed through countless printed pages on the subject of design. One who wishes to understand must study the principles. He must study historic art in order to find what is good, and why. He must also study nature for the inspiration that will enable him to invent ornaments of real interest.