Principles of Metallography is a comprehensive textbook written by Robert Seaton Williams in 1919. The book covers the principles and techniques of metallography, which is the study of the microstructure of metals and alloys. The author discusses the importance of metallography in the field of metallurgy and provides an in-depth explanation of the various methods used to examine the microstructure of metals. The book is divided into several chapters, each covering a specific topic related to metallography. The first chapter provides an introduction to the subject, explaining the importance of studying the microstructure of metals and the various techniques used for metallographic analysis. The subsequent chapters cover topics such as sample preparation, optical microscopy, etching techniques, and the interpretation of microstructures. The author also discusses the various types of metals and alloys, and how their microstructure affects their properties and behavior. The book includes numerous illustrations and photographs to aid in understanding the concepts discussed. Overall, Principles of Metallography is a valuable resource for students and professionals in the field of metallurgy and materials science. It provides a thorough understanding of the principles and techniques of metallography and their practical applications in the study of metals and alloys.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.