Projection apparatus, accessories and slides (1910)
McIntosh Stereopticon Co · Chicago : McIntosh Stereopticon Company · leaf 135
sed by the crossing of the lines at different angles and combination of the different colors on the discs. By turning the crank at different speeds forward and backward the lines appear to weave into each other, making a curious and beautiful effect which Is always mystifying and pleasing to an… … Design Slide. The discs are separated far enough apart to allow of the placing of a square design slide (like cut) between them, the frame being slotted at the top to admit this slide. When the square slide is used the ring discs 4, B or 6 are substituted for the full discs 1, 2 or 3, and when…
Slides (Photography)
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
