Apparatus used by Wheatstone for demonstrating pseudoscopic vision. Apparatus used by Wheatstone for demonstrating pseudoscopic vision
Six lenses, glass, in metal holders with three metal stands for holders, made 1850-1924 Six lenses, glass
'Elite' epidiascope with transformer unit and with lenses and carriers for lantern slides and 35mm slides, 1950-59. 'Elite' epidiascope with transformer unit and with lenses and carriers for lantern slides and 35mm slides
Replica reflection grating on glass base 4 x 3 x 1/2-inches (3600 lines/inch). Made from a ruled cylinder using Merton's method, vacuum-coated with aluminium, from National Physics Laboratory, Teddington, London, c. 1950 Replica reflection grating on glass base 4 x 3 x 1/2-inches (3600 lines/inch)
Set of 3 old prisms; chipped, mounted in brass with 2 mahogany carriers, c. 1800. Set of 3 old prisms; chipped
tongs for demonstrating double refraction using heat, with 10 glass cubes, by R. Fuess, Berlin, Germany, c. 1885. tongs for demonstrating double refraction using heat