This instrument was devised by M. Paul Nadar, the celebrated French photographer, but anyone can construct a similar apparatus. The arrangement is shown in Fig. 83.

The slides A and B B are adjustable so that any sized picture can be inserted and the sides closed round it to shut out the light from behind. A silver print unmounted is made transparent with vaseline and placed on the glass. Pieces of paper of various colors are placed in the reflector, C, and by this means all kinds of effects can be obtained. A landscape can be viewed as though under the pale reflected light of the rising sun behind the mountains, which may be changed gradually to the full light of day.