) 
end of the building, are the technical exhibits showing the tools, 
materials, and the various steps necessary in each of several proc- 
esses of reproduction. ‘The etching process, for example, is shown 
by a series of plates, each depicting a stage in development from the 
smooth copper plate to the finished one, ready for printing, A-com- 
plete etching outfit is included with this series, so that anyone 
fyno cares to, can With & careful study of the exhibit and its labels 
get a working knowledge of how etchings are made, 
: In the Same manner each of the processes of wood engraving, 
steel and copper engraving, lithography, collography, and modern 
processes of reproduction based on photography are more or less com- 
pletely shown, 
Among the unique and complete exhiodits, Japanese woodcutting 
and woodcut printing of pictures in color form a special feature. A 
complete set of tools and materials for such work is shown, together 
with several series of completed color plocks and successive proofs 
of the different color printings leading up to the finished picture, 
It is interesting to know how closely the processes of engrav- 
ing and etching are allied, and how they are combined in e single 
P work of art. The picture of Ariadne, engravec by A. B. Durand, and 
Binaiaentiy the first important engraving made in this country (1635), 
ds a good example of combined engraving and etching; the background 
«end setting is forwarded by etching, while the figure is engraved, 
z series of successive proofs shows how the work on the plate pro- 
pressed and to what extent the artist improved and developed it hbe- 
fore he took another proof. 
