Reversing prism for fitting to projector lens to reverse soundfilm picture for rear projection. Reversing Prism for 16mm Back Projection
Prism of uranium glass chipped (le. 7 1/16", side 1 11/16"), c.1850. May have belonged to John Lee of Hartwell House, Ayesbury, Bucks. England. Prism of uranium glass 1845-1855
Sodium Chloride (rock salt or NaCL) prism, for Infrared spectrophotometry [model 137] in sealed glass cover. Manufactured by Perkin Elmer Ltd. prism
Carbon disulphide prism, one of four, c.1900. Carbon disulphide prism, one of four, c.1900. 1875-1885
Echelon spectroscope, with wave length drum (Prism and Echelon grating chipped) by Adam Hilger Ltd., London, England, 1905, comprised of two units: constant deviation spectrometer and echelon grating. Echelon spectroscope 1905
Three-prism solar spectroscope with automatic prism adjustment for minimum deviation and a fixed equatorial mounting with drive by Howard Grubb, Dublin, dated 1871. Supplied by the Royal Society of London to J.B.N.Hennessey who used the instrument at Vincent Hill, Dehra Dun in the Indian foothills [7,000 ft.] of the Himalayas to map the solar spectrum between 1871-5. Solar spectroscope by Howard Grubb, Dublin, 1871 1871
Three prism solar spectroscope with equatorial mounting engraved 'Royal Society - 1867', made by Troughton and Simms, London, in two cases Three prism solar spectroscope with equatorial mounting and cases 1867
Carbon disulphide prism, one of four, c.1900. Carbon disulphide prism, one of four, c.1900. 1875-1885
Prism assembly from the Hadland hyspeed camera, 1980s. With two small plastic covers. In carton. Prism Assembly from the Hadland Hyspeed camera 1980s
Heptagonal prism a semi-regular solid, one of four prism models, made of coloured card by Mr R. Buckley, c.1973. Heptagonal prism a semi-regular solid 1973
Heptagonal star prism a semi-regular solid, one of four prism models, made of coloured card by Mr R. Buckley, c.1973. Heptagonal star prism a semi-regular solid 1973
Solar spectroscope with stand and two mahogany boxes by T. Cooke and Sons, York, England, 1881. Used at the Solar Physics Observatory, South Kensington between 1881 and 1912. The set of prisms give a high dispersion equal to 20 prisms, by passing the light through the prisms train four times. Solar spectroscope by T. Cooke & Sons, 1881 1881