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Concave diffraction grating on speculum metal

1910-1948 (estimated)

Spectrum comparator

1928

Heliostat with spring driven clock drive for use with table top spectrometers by Adam Hilger Ltd.

1919

The first Michelson Echelon Grating made in Europe with diffraction grating and 15 plates

1899

Hollow Prism of natural quartz with mounting lug on base

1900-1905

Adjustable slit for use with spectroscope

Abbe Refractometer, used by Horace Dall

1918-1920

Hilger wavelength spectroscope, with camera, London, England, 1919

1919

Schwarz double compensated thermocouple infrared detector made by Adam Hilger Ltd for double beam spectrometer

1950

Spectroscope on stand by Hilger no 10.301/20207

1920

Measuring micrometer made by Adam Hilger Ltd, 1939

1939

Spectro-photometer

1900-1980

Corner cube reflector prism in brass mount

1920-1930

Lummer plate

1904-1948

Liquid refractometer by Hilger, London, 1948

1948

left-handed quartz prism by Adam Hilger Ltd.

1900-1905

Fused Silica Prism (compound - 4 segments) by Adam Hilger Ltd.

1900-1905

Michelson interferometer

1900-1910

Glazed frame with photograph of Hilger Camera lens interferometer

1930-1932

Fluorite Prism by Adam Hilger Ltd.

1900-1905

35-plate echelon diffraction grating by Adam Hilger Ltd.

1930

Fused Silica Prism by Adam Hilger Ltd.

1900-1905

[Records of Adam Hilger Ltd., comprising research and product development reports 1916-1941, Twyman's appointment notebook 1931 and 1933, lists of customers for various instruments 1875-1947 and notes on the history of the firm. 1 box, 9 volumes. Listing available. See also inv. no. 1999-239]

Records of Adam Hilger Ltd.

circa 1875-1941

Muller X-ray Spectrometer, by Hilger

Muller X-ray Spectrometer, by Hilger

Prism interferometer (N.48) with five screw adjustment for the mirror (N.53) by Adam Hilger Ltd., London, England, 1930-1932.

Prism interferometer (N.48) with five screw adjustment for the mirror (N.53) by Adam Hilger Ltd.

1930-1932

Wavelength scale for quartz spectrograph, by Adam Hilger Ltd., London, England, 1920-1929

Wavelength scale for quartz spectrograph

1920-1929

Quartz and glass littrow type spectrograph by Adam Hilger Ltd., 1955-1960 used for metallurgical analysis

Quartz and glass littrow type spectrograph by Adam Hilger Ltd.

Grating spectrograph by Adam Hilger Ltd., London, used by W. Jevons, 1920-1930

Grating spectrograph by Adam Hilger Ltd.

1920-1930

Early model of the Guild trichromatic colorimeter, made by Adam Hilger Ltd., London, England (eye-cap missing)

Early model of the Guild trichromatic colorimeter

Direct vision pocket spectroscope with adjustable slit, in metal case, made by Adam Hilger Ltd., London, c.1910.

Direct vision pocket spectroscope with adjustable slit

1905-1915

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

Biochemical absorptiometer, serial No.H627.301/46265, Adam Hilger Ltd., London

Biochemical absorptiometer

Automatic spectroscope by G. and S. Merz (unsigned). Two micrometer slits in a mahogany box, drum of each divided into 100 parts. a) Sorby eyepiece in box by "A Hilger London", with position micrometer; 1 small screw missing, in mahogany box. Spectroscope is heavily constructed, height about 16", diam. of plate 12 1/2", 6 prisms, 3 eyepieces with washleather cover at eye end

Automatic spectroscope by G. and S. Merz (unsigned)

Beamsplitter for 2-colour cine process; 2 separation images on one frame. One only believed made, cost over £1000. Lenses individually adjustable for aperture; focusing control; no. CT3.301/35201.

Beamsplitter for Cinecolor Process

Littrow mahogany cased spectrograph by Adam Hilger Ltd., London, from the laboratory of Sir Thomas Merton

Littrow mahogany cased spectrograph by Adam Hilger Ltd.

spectroscope; mounted on wood shaft, which has an iron girder attached to it. Also as a small screen (separated from main object). Manufactured by Adam Hilger Ltd, London.

Spectroscope Mounted on Wooden Shaft

Slit width adjustable by micrometer screw, calibrated 0-50 x 0.01mm. Slit length adjustable V slider, calibrated 0-18mm. 28mm tube fitting with locking screws. Adam Hilger Limited.

Hilger Adjustable Slit

Prism spectrograph by Adam Hilger Ltd mid, London, 1930's used by Sir Harold Thomson

Prism spectrograph by Adam Hilger Ltd mid

E498 medium quartz spectrograph with Barfit accessories made by Adam Hilger Ltd., London, 1940-1950

E498 medium quartz spectrograph with Barfit accessories made by Adam Hilger Ltd.

1940-1950

Hilger one-shot colour camera. Camera for 1/2 plates; lens missing; mirror beam splitting; circular mirror, annular mirror for left and right beams, light passing mirrors reaches plate at rear. Filters held in frames in front of plates (2 or 3 missing). Lever focuses all three plates simultaneously.

Hilger One-Shot Colour Camera

1926-1936

Spectrophotometer, Adam Hilger Ltd., H16, date c. 1928

Spectrophotometer, Adam Hilger Ltd

Made in England. Crackle painted metal body, hinged back with rack and pinion adjustments to plateholder position. No 072304/47379.

Hilger Spectroscopic Camera

circa 1919

Lowry thermostat

Lowry thermostat

1914

Hilger Spekker photoelectric absorptiometer Type H760, 1948

Hilger Spekker photoelectric absorptiometer Type H760

Additional parts associated with Hilger wavelength spectrometer, by Adam Hilger Limited, London, 1918-1920

Additional parts associated with Hilger wavelength spectrometer

1919

Original cardboard box, for Wavelength scale for quartz spectrograph, by Adam Hilger Ltd., London, England, 1920-1929

Original cardboard box

1920-1929

Spekker photo-electric absorptiometer c.1940, made by Adam Hilger Ltd. with set of light filters and set off glass cells and with galvanometer. Made by Cambridge Instrument Co. (See note)

Spekker photo-electric absorptiometer c.1940, With light filters, glass cells and galvanometer

1940

Two large 60 º glass prisms made by Adam Hilger Limited for the three prism Oxford Solar Spectroscope. These were replacements for the original prisms supplied in 1938 but apparently were never used as the instrument was replaced by a spectrograph using a grating.

Two large 60 º glass prisms

1940-1950

Selection of components from the three prism Oxford Solar Spectroscope made by Casella Limited with optical components from Adam Hilger Ltd. for the University Observatory, Oxford in 1938. Parts include two large 60 º prisms, one prism stand and the collimator objective lens.

Selection of components from the three prism Oxford Solar Spectroscope made by Casella Limited

1938

Mutochrome, made by Adam Hilger Ltd. London, England, for the chromoscope Co. Ltd., with box of coloured glass discs

Mutochrome, made by Adam Hilger Ltd. London

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