Magic lantern rackwork slide
- Made:
- 1880-1890 in unknown place
Hand coloured magic lantern rackwork slide of a photographer behind a camera taking photographsof a woman holding her child, whose face changes with 24 different expressions as the handle is turned.
In a rackwork slide one glass disc revolves in front of another. The moveable glass is mounted in a brass collar with a series of vertical teeth around its upper edge, forming a rackwork rim. A steel pinion with a matching toothed-end engages the rackwork and a handle is fixed to its other extremity. On turning the handle the rackwork is driven round by the pinion causing the glass to rotate.