X LIST OF ILLUSTRATIONS. NO. PAGE 22. Diamond diaper i6 23. Frets, etc., on the lines of a square lattice . . 17 24. Triangle. Equilateral triangle. Diamond . . 19 2^. Diaper built on a triangular plan — Alhambresque TILE mosaic 20 26. Hexagonal and star-shaped diapers built on triangles 20 27. Diapers built up of hexagons 21 28. Lattice and the lines on which it is built — Indian PIERCED stone 21 29. Lattice and its triangular b.sis — -Indian pierced STONE 22 30. Lattice and its triangular basis — -Indian pierced STONE 23 31. Octagon and the lines on which it is built . . 24 32. Different views of same pattern 25 33. Pattern from cane-bottomed chair .... 25 34. Tile work from the Alhambra 26 35. Simple and more complicated trellis lines . . 27 36. Pentagon diaper and its skeleton . . . . . 27 37. Zig-zags developing into wave lines .... 28 38. Relation of octagon to circle diaper .... 29 39. Straight-lined and curvilinear varieties of the same pattern — Alhambresque tile mosaic . . 29 40. Diaper of circles planned on square lines . . 30 41. Diaper of circles planned on diamond lines . . 30 42. Diaper of circles planned on lines of diagram 40, BUT radius relatively WIDER 30 43. 44. Diaper of circles pi.. ned on lines of di.gr.m 41, but radius relatively wider . . . .30,31 45. Double diaper of circles planned on lines of diagram 40, but 'radius relatively wider still . 3i 46. Diaper of interlacing circles 32 47. Diaper of circles interlacing with square trellis . 32 48. Diaper of scales and derivatives from it . . -33
