""A History of Metallography: The Development of Ideas on the Structure of Metals before 1890"" by Cyril Stanley Smith is a comprehensive account of the evolution of metallography, the study of the structure of metals. The book covers the period before 1890, a time when the field was in its infancy and the techniques used were rudimentary. The author explores the early experiments and discoveries that laid the foundation for the science of metallography, including the work of Henry Clifton Sorby, who developed the first microscope capable of examining metals at high magnification. Smith also examines the contributions of other pioneers in the field, such as Gustav Rose, Ferdinand Osann, and Carl Wilhelm Scheele.The book delves into the various theories that were proposed to explain the structure of metals, including the crystal lattice theory and the colloid theory. Smith also discusses the role of impurities in metal structures and the impact of alloying elements on their properties.Throughout the book, the author provides detailed descriptions of the experiments and techniques used by early metallographers, including etching, polishing, and microscopy. He also includes numerous illustrations and photographs to help readers visualize the structures of various metals.Overall, ""A History of Metallography"" is an informative and engaging account of the development of this important field of study. It will appeal to anyone interested in the history of science, materials science, or metallurgy.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.