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Modified spurge photometer.

Everett Edgcumbe auto photometer

Ritchie's photometer

1827-1856

Beads for Wheatstone's photometer

Everett Edgecumbe photometer, no. 356504

Photometer model S511 by Weston

Flicker photometer mounted on short metal rod

1900-1980

One Lummer-Brodhun photometer head

Flame photometer

Photometer, marked: ‘39 G’

Decoudun photometer

1800-1950

Joly's photometer by Griffin and George Ltd.

1954-1983

Spurge Photometer

Photometer, marked: ’34 G’

Lummer Brodhun photometer

1900-1980

Holophane-Edgecombe street lighting photometer in purpose built oak box

circa 1950

Holophane-Edgcumbe Auto-photometer in box

Lowe jet photometer, c.1860.

Lummer Brodhun photometer head

Lummer-Brodhun photometer

Portable photometer

Wild flicker photometer

Spectro-photometer

1900-1980

Extinction meter with rotating continuous wedge; two blue filter settings; for use on camera ground glass screen; in leather purse.

Heyde's Aktino-Photometer

Dr. Letheby's photometer, consisting of a Bunsen photometer-head and two movable carriages. Made by William Sugg, Gas Engineer, Westminster, London, S.W.

Letheby's Photometer

Flame photometer. No.866150

Flame photometer. No.866150

1900-1980

Comparison photometer, possibly home made. Split field comparison. Direct vision through circular step wedge, blue tint, calibrated, 0, 10, 100, 1000, 1:10, 1:100, 1:1000. Mirror reflects illulmination from disc with step wedge, calibrated 160, 250, 400, 600, 1000, lit by small bulb. Powered by flat battery (Ever ready pat. 24008/08) through press switch and rheostat adjusted by screw from exterior of case. MEter connected across lamp. Calibrations for f/4.5 and 16sch. Table in Swedish giving shutter speeds for photometer settings.

comparison photometer

Exposure meter made for use with easrly technicolor process. Cylinder 7.7cm diameter, 13.2cm long 3 diameter lens at one end with hinged flap with 1cm diameter hole. Output from photocell read by Westinghouse meter calibrated 0-20. Scale marked average stops. Raise flap: divide by ten. Optical frame finder with pin and ball back sight. Conversion tables taped to cylinder. Scale reading 1.0-16.5, conversion 2.5-41.25. No.25.

Technicolour Reflection Photometer

McMurty Photometer. Extinction type meter, card with rotating sector wheel which reduces the aperture for viewing, continuously. Manufactured by McMurtry and Co., Chicago.

McMurty Photometer. Extinction type meter

1914-1924

Photometer made by Schmidt and Haensch. (Described under Cat.No.369, physics catalogue, 1905 Ed.)

Photometer made by Schmidt and Haensch

Illumination photometer, N.P.L. 1928 design

Illumination photometer, N.P.L. 1928 design

Two photometers, one marked: ’39 G’, and the other: ’34 G’, both, made by JENNEN

Two photometers

Wheatstone type photometer, in brass box, six cork discs with silvered beads to give various curves, by William Ladd, London, England, 1870-1872

Wheatstone type photometer

1872

Recording comparato-microphotometer Model L900 by Rank Precision Industries Ltd., London

Recording comparato-microphotometer Model L900 by Rank Precision Industries Ltd.

Abney type colour photometer with rotating sector apparatus by Adam Hilger, London, 1888. commercial version of photometer used by Sir William de Wiveleslie Abney and Major-General E. R. Festing in their researches.

Abney type colour photometer with rotating sector apparatus by Adam Hilger

1888

Conroy photometer in black box, Everett Edgcumbe and Company Ltd., London, 1920-1946.

Conroy photometer in black box

1920-1946

Watt photometer by Everett and Edgcumbe

Watt photometer by Everett and Edgecumbe

Apparatus for measuring the brightness of the night sky (by comparison with fluorescent light excited by radiations from a uranium sample), by Robert John Strutt (4th Baron Rayleigh), England, 1900-1939

Apparatus for measuring the brightness of the night sky

1900-1939

Hurter and Driffield photometer made by J Willis Grundy. For comparison of light sources, standard of unknown. Fitted with Lummer-Brodhun head on rack mounted carriage; moving on calibrated scale; standard lamp aperture fitted with rotating disc with 4 apertures.

Hurter and Driffield Photometer

1903

Knobel's astrometer, in case

Knobel's Astronometer

1890-1900

Photometer; 42mm diameter shallow brass mount, glass fronted; 6 tinted segments around central aperture for sensitive paper.

Woodbury Photometer

Simmance-Abady Flicker photometer by Nalder Brothers & Co., London, c.1910.

Simmance-Abady Flicker photometer by Nalder Brothers & Co.

1905-1915

Oldham portable photometer, used for finding candle power of miner's lamps

Oldham portable photometer

Microphotometer by Hilger and Watts London, c.1960

Microphotometer by Hilger and Watts London, c.1960

Flame photometer (trade name E.E.L.), complete, unsectioned

Flame photometer (trade name E.E.L.)

Bunsen photometer

Bunsen photometer

Portable illumination photometer diaphragm type

Portable illumination photometer diaphragm type

Autoanalyser Flame Photometer Mk III, by Technicon Corporation, Ardesley, New York 10502, United States.

Autoanalyser Flame Photometer Mk III

Phosphotometre Filmograph Comparison photometer - battery operated 2.5v bulb wired through variable resistance operated through pull-out slider calibrated 0-50. Lamp seen through sliding continuous wedge calibrated 0-50 and f/f2.7-14 (Pour Pathe Baby), then through lens and reflected in 45 degrees glass through which scene is observed. Small milled knob rotates blue filter over viewing aperture. Made by Les Establishments Filmograph, 47 Rue Bangreaux, Montrouxe. (M953)

Filmograph photometer

Made in Switzerland. Hunter pattern watch type actinometer. In original carton with 2 packets of paper and instructions in German.

M and V Photometer Model B

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