however, to exist in galloflavin and the alizarin yellows marked A and
C, and, as you see, they are of about the same degree of fastness.

Among the red dyes we have alizarin and its numerous allies, and these
are certainly fit representatives of the madder root, which indeed
they have almost entirely displaced. The most recent additions to this
important class are the various alizarin Bordeaux. The only dyes in
this group which appear somewhat behind the rest in point of fastness
are purpurin and alizarin maroon.

On this same diagram we notice, also, fast blues and dark greens, of
which we have no similar representatives among the natural coloring
matters. I refer to alizarin blue, alizarin cyanin, alizarin indigo,
alizarin green, and coerulin.

Further, an excellent group of coloring matters, giving fast browns
and greens with copper and iron mordants respectively, is formed by
naphthol green, resorcinol green, gambin, and dioxin.

The only fugitive dyes of the class now under consideration are some
of the yellows, gallamin blue and gallocyanin.

If we now turn to examine the colors given by these artificial
"mordant dyes" on silk, we notice, also, a good series of fast colors
similar to those which they give on wool; and even on cotton we see
many fast colors, of which we have no representatives among the
dyewoods.

If we were not prepared to find so few really fast natural dyes,
surely we cannot but be surprised to find what a considerable number