Overview of the "wool dyes (acidic and substantive dyes)", Volume VII, first part, leporello with numerous color samples, each wool appliqué, these executed in different concentrations of the dye, in the cover a booklet with an explanation of the different processes, text each in German, English, Spanish, French, Italian and Portuguese, brown half linen binding, in a brown cardboard slipcase, signs of age, binding slightly stained, otherwise in good condition, 1920s
