zzo, consisting of two life-sized figures of Saint John the Baptist
and Saint Francis. They appeared to me to be treated in a somewhat more
archaic style than the subject of the window in the cathedral, but were
in no degree inferior in truth and accuracy of drawing and brilliancy of
color.

Above all, on one side of the room, were the furnaces in which the great
work of burning in the colors is achieved. Does the reader know under
what conditions of difficulty this part of the work is performed? When
the harmony of the coloring of a picture, especially in a branch of art
in which color goes for so much, has been duly considered and determined
on, it would not do to have that which was intended for a scarlet robe
turning out a crimson one, nor a brilliant emerald-green changed to a
bottle-green, nor, even yet more fatal, the delicate azures and lilacs
and grays of a distant landscape changed to comparative opacity, or
indeed altered by the shadow of a half-tint from that which the artist's
eye has designed for them. But if this is so with respect to the hues of
drapery or of landscape, it is easy to imagine how much more fatal would
be the slightest alteration of tint in those pieces of the glass which
are destined to represent the naked portions of the human body--in the
faces, the hands, the feet. And when, bearing these considerations in
mind, we further learn that the very smallest degree of heat in excess
of that which is required for the purpose in hand, or the very smallest
deficiency in the heat, or the greater or less degree of rapidity with
which this heat is communicated to the glass--any variation from the
exact point needed in each of these conditions--will without fail have
the effect of altering the result, it may be imagined how great are the
difficulties with which the artist has to struggle. And let it be
remembered that in other establishments for the revival of this
beautiful art the great modern principle of the division of labor is
called into aid in producing the result. The man whose business it is to
manage the furnace does this alone. All the power of his intelligence,
all the rule-of-thumb derived from his practice, is devoted to this
alone. Unable to do anything else, he has acquired the art of heating a
furnace to the exact degree needed. It is hardly necessary to insist on
the greatness of the change in the conditions when this specialty has to
be undertaken by the same brain and hands which