Displacement Interferometry By The Aid Of The Achromatic Fringes, Part 3 (1919) is a scientific book written by Carl Barus. It is a continuation of his previous works on displacement interferometry and focuses on the use of achromatic fringes in the process. The book is divided into several chapters, each discussing a specific aspect of the topic. The first chapter provides an introduction to the concept of displacement interferometry and the use...