""Displacement Interferometry By The Aid Of The Achromatic Fringes, Part 3"" is a scientific book written by Carl Barus and published in 1919. The book is part of a series that focuses on displacement interferometry, a technique used to measure small changes in the position of objects. In this particular volume, Barus explores the use of achromatic fringes in displacement interferometry. Achromatic fringes are a type of interference pattern that is...