The more colors are used for the drawn marble, the less of each color except black should be thrown on the size. Although the colors have been adapted to each other in regard to their power of expansion before using them, it is indispensable in producing these marbles with such a large number of colors to assist the expansion of one color or the other by a few drops of ox-gall. It is necessary to see, that the second color should not too greatly be displaced by the third, the third by the fourth, etc., because the color, which is mostly displaced would not appear in the marble at all. In producing peacock marbles, I obtained most excellent results even without primary colors. They were not so bright and lustrous in their general color effect, but their most subdued tones were most pleasing to the eye. To one of these marbles I used the colors in the following order; black, medium olive green, dark bluish-green, bronze or ochre yellow, dark blue and bright chrome yellow, (to obtain the olive, use the following mixture; 3 parts light orange, 1/2 part dark blue; bluish-green as described above; ochre yellow, 2 parts light chrome yellow, 1 part brown; blackish-blue, 2 parts dark-blue, 1 part black; light chrome yellow, 2 parts light orange, 2 parts white.) Beautiful bouquet marbles are obtained from the following colors; blackish-green, 2 parts black, 1 part green; yellowish-green, 2 parts yellow, 1 part green; light-brown, dark bluish-green as above, scarlet-red and light ochre yellow. In this way many combinations of color can be obtained, and it is left to the judgment of the marbler to select colors and make the mixtures. Having succeeded in producing beautiful marbles with few colors, it will be easy for anyone to produce others with more colors. MARBLED EDGES. MARBLED EDGES. (SEE SPECIMEN PLATES.) Many of my colleagues are of the opinion, that marbled edges are inferior to drawn edges, but this is a great mistake, and here we are able to show in what directions the marbling art is able to develop to its full glory. The field for marbled edges is so large and prolific in the variations of shade, that there are really no limits to its capabilities. While making experiments in this field, by accident I came across some edges without having an idea of the effect of the combination which so astonished me by its beauty. It would be endeavoring too greatly to describe the method of producing all effective marbled-edges which came to my knowledge in my many years' experience, I therefore name but a few which will certainly invite imitation and study. Marble is the design of an edge of a book, which has a ground or back color and over which a net of veins of different colors is stretched.