NEWTON'S COLOUR DISC
For demonstrating that white light may be composed from all the spectral colours by rotation of multi-coloured disc. Comprising a 200mm metal disc mounted on a metal stand and driven by belt with the help of driving wheel fitted with a handle, can be clamped on table.

RAY BOX
A ventilated lamp house having an open front with extended sides finned externally for heat dissipation and vertical internal grooves to accommodate a slit plate and cylindrical lens.
It has a light source comprising 12V lamps in a holder with one meter of twin flex having banana plugs. Complete with metal plate having single and triple slits and whitened on one side- the other side black matt. Without lens.

ARCO RAY OPTICS AND COLOUR MIXING BOX
Metal box with 12V 24W straight filament lamp. The body is fitted with a cartridge holding 4 types as slits, single, double, triple wide slots with colour filters. It carries a convex cylindrical lens. Long clear tracks parallel, converging or diverging are obtainable. It can be used for demonstration of path of rays with light demonstration guide.

DIRECT VISION SPECTROSCOPE
For the rapid examination of spectral composition of white light. Metal tube with draw out focusing and an adjustable slit fitted with achromatic objective glass and 3 element prisms. Complete in wooden velvet lined case.

ACRYLIC BLOCK, RECTANGULAR
Clear acrylic faces fully polished.

SEMICIRCULAR BLOCK
Clear all faces polished.