Kirjahaku

This exciting and challenging collection of 31 full-page geometric designs is based on beautiful Islamic art patterns selected from a rare 19th-century album. Intricate illustrations combine polygons, stars, rosettes, and other highly detailed images. Pages are perforated and printed on one side only for easy removal and display. Specially designed for experienced colorists, Arabic Patterns Coloring Book and other Creative Haven(r) adult coloring books offer an escape to a world of inspiration and artistic fulfillment. Each title is also an effective and fun-filled way to relax and reduce stress. Previously published as Arabic Allover Patterns.

In introductory solid-state physics texts we are introduced to the concept of a perfect crystalline solid with every atom in its proper place. This is a convenient first step in developing the concept of electronic band struc­ ture, and from it deducing the general electronic and optical properties of crystalline solids. However, for the student who does not proceed further, such an idealization can be grossly misleading. A perfect crystal does not exist. There are always defects. It was recognized very early in the study of solids that these defects often have a profound effect on the real physical properties of a solid. As a result, a major part of scientific research in solid-state physics has,' from the early studies of "color centers" in alkali halides to the present vigorous investigations of deep levels in semiconductors, been devoted to the study of defects. We now know that in actual fact, most of the interest­ ing and important properties of solids-electrical, optical, mechanical- are determined not so much by the properties of the perfect crystal as by its im­ perfections.

Nearly 200 examples exhibit the wide range of Islamic art, including hexagon and octagon designs, combinations of stars and rosettes, and many variations on other geometric patterns. Twenty-eight examples from traditional sources in Cairo and Damascus include sanctuary doors, openwork windows, and inlaid marble pavements and ceilings.