Optical crystallography is a rapidly growing field. The study of crystal optics is no longer confined to the mineralogist and the petrographer. Although the fundamental theories were developed by early optical crystallographers who perfected polarizing microscopes for the examination of thin slices of rocks, scientists in many other fields of investigation have come to recognize the value of these powerful tools for research.

Optical crystallography contributes greatly to research in many branches of chemistry. It is used chiefly in the rapid identification of solids, whether organic or inorganic. Metallurgists, ceramists, and workers in related fields accept optical theory and instruments as indispensable parts of their working equipment. The medical profession makes use of the polarizing microscope in its battle against industrial diseases such as silicosis. Engineers obtain critical data from the microscopic examination of many structural materials with which they work.

It is the purpose of this text book to review the principles of optical crystallographic theory. Practical applications are not give a prominent place because Iz feel that, once a student has firmly grasped fundamental concepts, he will be able to meet any problem related to the field . Some space is given to a description of the techniques of the measurement of refractive indices. Emphasis is placed on the immersion method of index measurement, for this technique is the most widely used. …

The reader will observe that the text is profusely illustrated. Three dimensional visualization is required of the student who wishes to master the theory of optical crystallography. With this in mind I have abandoned many of the two dimensional illustrations in favour of block diagrams. All diagrams in which the third dimension has been indicated were drawn in clinographic projection: this type of projection is familiar to the crystallographer but may present a slightly distorted appearance to one who is accustomed to block diagrams drawn in perspective.

No effort is made to include descriptive tables of minerals or crystalline chemicals. Optical descriptions of most natural and artificial compounds are to found in many standard references on mineralogy and chemistry.

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Authored by Ernest E. Wahlstrom and published by Wiley & Sons of New York in 1959. Hard cover bound, this Second Edition, 5th Impression is in Very Good condition, covered in plastic and without a dust jacket. The size of the book is 233x155x16mm.

247pp incl index. Book has some underlining in pencil and occasional colouring in of the figures, which is actually an aid to understanding. Seems to be rare.