Fifth article in a series by Professor Charles E. Pellew of Columbia University on the Basic (aniline) dye-stuffs, written for readers of The Craftsman. It traces the origin of these dyes from Perkin's Mauvein of 1856 through Methyl Violet, Fuchsine/Magenta, Bismarck Brown and Methylene Blue, and explains how they bond with animal fibers and how tannin and tartar emetic mordants fix them to cotton and linen. It gives dyeing directions for straw, raffia and leather, including finishing waxes, and ends with recommended dyes and a list of dye-house products.