Spectroscope apparatus for Solar spectrum research
1839-1860
Rock salt prism used in pioneering work on the infra-red spectrum, 1920-1940
circa 1930
John Browning’s, 1875 'Popular' single prism student spectroscope, with case
1875
Prism for AGA Thermovision 680
1977
Prism of Thallium glass on wooden plinth
1865-1875
Microscope Prism
1900-1910
Hollow Prism of natural quartz with mounting lug on base
1900-1905
Spectro-prisms, used by Horace Dall
Spectro-prisms, used by Horace Dall
Equilateral prism
1900-1980
Lenses and prisms, boxed
Centre separating prism for Barr and Stroud rangefinder
1920
Equilateral prism
1900-1980
Prism type LF 2349 optically polished by Barr and Stroud Ltd.
1986
Fused Silica Prism by Adam Hilger Ltd.
1900-1905
Potassium Bromide prism for IR wavelengths
1945-1955
Model of the 'Porro' erecting system for binoculars
1930-1950
'Barred' type glass optical field-prism
1920-1950
Watson and Sons, Right Angle Prism
Rough ground blank for mfr. of prism type LF 2349
1986
Model showing mounting method for glass roof prism
1920-1950
Wedge-shaped glass prism with variable density tint
1930-1950
'Fresnel' type circular glass biprism
1920-1950
Small wedge-shaped glass prism
1920-1950
Two prism spectroscope by John Browning,1890
Brass prism holder, from spectroscopic microscope
Binocular spectroscope apparatus, Dublin, 1874
1874
'Half-penta' type glass erecting prism
1920-1950
Solar spectroscope with stand by T. Cooke and Sons
1881
Fused Silica Prism (compound - 4 segments) by Adam Hilger Ltd.
1900-1905
Glass triangular astrolable prism
1930-1950
Two-prism spectroscope
1885-1895
Binocular spectroscope apparatus with case
1874
Four-prism spectroscope
1865-1875
Polished prism which forms part of a persicope sight
1980
Equilateral prism
1872
Automatic spectroscope by G. and S. Merz (unsigned)
right-handed quartz prism
Calcite Prism
Two prisms for spectrometer
Uranium glass prism angle 60 degrees
Optically worked prism in borosilicate crown glass
1980
Wedge-shaped glass prism with variable density tint
1930-1950
Two wedge-shaped glass prisms with variable tint
1930-1950
Brass astronomical spectroscope
1870-1890
Selection of components from the three prism Oxford Solar Spectroscope made by Casella Limited
1938