This antique text contains a comprehensive reference book on the subject of the metallography of aluminum alloys. This text was intended for consultation by the plant metallurgist, rather than as a textbook for students. For these reasons no details have been given on general metallurgy and metallography, and most of the theoretical problems have not been treated at all or have been dismissed briefly. The chapters of this book include: Equilibrium Diagrams, Binary Diagrams, Ternary Diagrams, Quaternary Diagrams, Polishing and Etching, Macro-Examination, Polishing, Etching, Constituents, Master Allows, Aluminum-Copper Alloys, Aluminum-Silicon Alloys, and much more. Many antique books such as this are increasingly costly and hard to come by, and it is with this in mind that we are proud to republish this text here.