Directions for use of the Krōmskōp lantern (1898)
London : The Photochromoscope Syndicate, Limited · leaf 8
6 KROMSKOP COLOR PHOTOGRAPHY. … Fig. 12. It is then necessary to push the lamp or jet towards the con- denser until the disk on the screen is filled with light. Careful centering and adjustment is necessary to obtain an evenly illuminated disk, which can be separated by the movement of the lever into three colored disks, which…
Projectors · Color photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
