A 1942 loose-leaf atlas of photomicrographs for identifying common textile fibers, with accompanying text on their microscopic structure and measurement. It covers wool (including U.S. grade standards, fineness measurement methods and fiber damage), specialty and minor hair fibers, fur fibers, silks, cotton and other vegetable fibers, rayons, protein and synthetic fibers (prolons and synthons such as nylon and vinyon), and mineral fibers. Numbered plates of micrographs are paired with data tables, a comparative fineness scale, and a bibliography.