THE EIDOTROPE.
Perforate two metal or board discs, and make one turnable around in front of the other, by means of a band and pulley, while both are mounted as a magic-lantern slide.
When their shadows are thrown on the screen, the effect of the revolving plate more or less eclipsing the other, is to create singular forms.
To imitate watered silk, use wire gauze. For effect, let the light pass through tinted glass.
