Excerpt from A Text-Book of Important Minerals and Rocks: With Tables for the Determination of Minerals
Chapter I of the book contains in brief outline the more fundamental principles of crystallography, followed by a description of the different crystalline systems and of some of the more important crystalline aggregates and irregular forms. The subject-matter of the chapter can be almost indefinitely extended by lecture if so desired. The reason that the crystallographic branch is so briefly treated is stated in the introduction to the book, no other treatment being considered appropriate in a short general course.
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