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Prism

Prism

Glass prism showing the illusion of a goblet

Glass prism showing the illusion of a goblet

1845-1855
One of a pair of prisms in frames

One of a pair of prisms in frames

Fluorite Prism by Adam Hilger Ltd.

Fluorite Prism by Adam Hilger Ltd.

1900-1905
Carbon disulphide prism, one of four by William Ladd

Carbon disulphide prism, one of four by William Ladd

1870-1884
Rangefinder centre prism, strip field type

Rangefinder centre prism, strip field type

Reversing Prism for 16mm Back Projection

Reversing Prism for 16mm Back Projection

Prism of quartz: triangular action

Prism of quartz: triangular action

Centre separating prism for Barr and Stroud rangefinder

Centre separating prism for Barr and Stroud rangefinder

1920
Carbon disulphide prism, one of four by William Ladd

Carbon disulphide prism, one of four by William Ladd

1870-1884
Prism type LF 2349 as generated on Blanchard surface grinder by Barr and Stroud Ltd.

Prism type LF 2349 as generated on Blanchard surface grinder by Barr and Stroud Ltd.

1986
Prism of quartz: square section

Prism of quartz: square section

Hartridge prism

Hartridge prism

1984
Prism. Glass

Prism. Glass

Small prism in cylindrical brass fitting

Small prism in cylindrical brass fitting

Prism assembly from the Hadland hyspeed camera, 1980s. With two small plastic covers. In carton.

Prism Assembly from the Hadland Hyspeed camera

1980s
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
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
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
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
One of a pair of prisms in frames

One of a pair of prisms in frames

Prism and lens, glass, for use with lantern, made by J. H. Dallmeyer, London, 1850-1924 (Wellcome No. B1039 & A109743)

Prism and lens

1850-1924
Mercury Prism, in mahogany case

Mercury Prism

Sodium Chloride (rock salt or NaCL) prism, for Infrared spectrophotometry [model 137] in sealed glass cover. Manufactured by Perkin Elmer Ltd.

prism

Glass prism in metal tube, position of prism adjustable, made 1850-1924 (Wellcome No. B1037)

Adjustable glass prism in metal tube

1850-1924
Glass prism with brass handles, made 1850-1924 (Wellcome No. A230146) B number also on card (B1049)

Glass prism with brass handles

1850-1924
Prism of crown glass angle 90 degree, length 68mm

Prism of crown glass angle 90 degree, length 68mm

Two compound prisms for direct vision spectroscope by E. Lutz, Paris, 1876. Total length 11.3 cm and 10.8 cm. Length of each prism 2.6 cm

Two compound prisms for direct vision spectroscope by E. Lutz

1876
Glass prism with brass handles, made 1850-1924

Glass prism with brass handles

1850-1924
Carbon disulphide prism, one of four, c.1900.

Carbon disulphide prism, one of four, c.1900.

1875-1885
Glass prism in brass tube, position of prism adjustable, made 1850-1924

Adjustable glass prism in brass tube

1850-1924
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
Glass prism, made 1850-1924 (Wellcome No. B1045)

Glass prism

1850-1924
Carbon disulphide prism, one of four, c.1900.

Carbon disulphide prism, one of four, c.1900.

1875-1885