Hartley's Rotatable Optical Disc Material_Muslin and 26 SWG - sized

and 26 SWG - sized as the matched replacement set for the PH0730 sonometer

a 125 by 65 by 18mm acrylic rectangular block with beveled edges widens the visible refraction shift in Snell's law setups

9-piece organic chemistry and distillation glassware set provides comprehensive apparatus for laboratory synthesis and separation procedures

Hard-plastic 13x13-inch Worcester circuit board with 12 metal poles and 4 banana terminals

with a (Br) marking visible on one face for easy identification

Hartley's Rotatable Optical Disc Material_Muslin and 26 SWG - sized230mm disc graduated 0 360 degrees in 1 degree steps locks in any position alongside a rotatable lamp house and six magnetic acrylic elements for full ray tracing studies of reflection and refraction.