Among the great number of numeral colors there are many which in spite of their amorphous properties are bad marbling colors, such as the compounds of copper, zinc and arsenic. Often it depends upon the manner of manufacturing, even if the color have a good body whether it can be used by us, as, for instance, white lead and barium both of which can be produced as good or useless colors. The general idea, that light colors are the best, is erroneous, even heavy oxides of metal being excellent colors. Not in weight but in divisibility rests the excellence, for instance I mention pure oxide of iron, cadmium, sulphate of mercury and mercury iodide. These are all heavy metallic oxides and good colors. Exclusive of the colors the different ways of sizing are most essential parts of marbling. They exercise a great influence on the success of beautiful edges and for that reason I directed my closest attention to them. The more homogeneous and the smaller the viscosity of the mucilage of the sizing, the better for comb, peacock and bouquet edging. Marbled and veined edges demand more viscosity of the mucilage, which, if the sizing does not possess it, is usually formed during the first stage of decomposition, when the normal time for using it for comb edges has passed. I will mention further on the ox-gall and the sprinkling water, which are indispensable on account of their binding and expanding powers for the purposes of marbling. It is an easy manipulation to prepare ox-gall, so that it does not decompose, but on the other hand a much greater attention must be paid to the binding and expanding powers of the same, as they may have, in spite of its excellent qualities for color, by insufficient caution in their handling the most deleterious influences on the colors as well, as on the sizing and in most cases are the causes of the failure of the edging. There are several substances, which possess qualities similar to ox-gall and many others which possess only its expansibility. To the former belong resins which are insoluble but which can be dissolved by the addition of ammonia or borax, to the latter fatty acids of alkali, which we know by the name of soaps and which I shall describe in the article on ox-gall. Sprinkling-water is mostly used on account of its greater expansibility and its propensity to form circular spots on the marbling ground, (sizing) for veined edges, or as an addition to the ground color of the marble edge. Although it does not possess the binding power of ox-gall for colors in such a degree, it is nevertheless, worthy of our attention. It was the aim of my investigations during many years to bring this all into a harmonious ensemble, and produce a fine and paying work.