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Sun duration sensor, actinometer, by R & D Electronics, 1997

Meteorology

1997

Herschel actinometer by Robinson & Barrow, 1842

Meteorology

1842

Michelson actinometer, no.2987 by Russian maker, 1

Meteorology

1955

Herschel actinometer, unsigned, numbered 11

Meteorology
Actinometer, bookform, in wallet. Fold-out card containing instructions booklet, all within paper wallet.

Imperial Exposure Meter

Photographic Technology

Herschel type actinometer, 1849-1851

Meteorology

1849-1851

Michelson actinometer, incomplete, Russian made, i

Meteorology

1960-1970
Watch type actinometer with in-door meter dial. Watkins Meter Company.

Watkins indoor meter

Photographic Technology
The Infallible Exposure Meter Company, Wrexham. Pocket-watch form actinometer; in tin with instructions, plate speed chart, replacement Autochrome dial and 2 packets of rapid deadmatch paper.

Wynne's Infallible Hunter Meter

Photographic Technology

1910
Watkins Bee meter, made by Alfred Watkins. Actinometer, watchform exposure meter.

Watkins Bee meters

Photographic Technology
Wynee's Infallible Hunter meter. An actinometer - pocket watch form; opens to reveal sensitive paper holder in one half and calculator in the other, Scales: 64 seconds to 1/1000, f.3 1/2-156.

Wynne's Infallible Hunter meter

Photographic Technology
Wynee's Infallible Hunter meter. Watchform actinometer. Sensitive paper visible through window in the face; two scale 1/128 - 64, F. 4-362.

Wynne's Infallible Hunter meter

Photographic Technology
Watkins dial meter, made by Watkins Meter Co. Watch-form actinometer; plain glass and mask with standard tint; covered paper disc. Two levers adjust calculator dials behind mask.

Watkins Dial Meter

Photographic Technology
Hurter and Driffield Actinograph Patent No. 5545 1888, with slide rule calculator with roller, seals for H & D speeds 300-0.5: light: very dull - very bright, aperture f/2.8-64, exposure time 0.05sec to 60 secs. Time of year and day on roller. Calibrated for North latitude 52 30 0 degrees. In wooden case. Marion & Co. 1892.

Hurter and Driffield actinograph

Photographic Technology

1892
Wynne's Infallible print meter. Plated metal box with paper holder in lid. Numbered and lettered transparency (1-16; A-P) printed under; ground glass (over numbers) opal glass (over numbers); through perforated metal plate with graduated holes and opal glass.

Wynne's Infallible print meter

Photographic Technology
Le Chronoscope PAP cylindrical actinometer. Lens at one end, paper holder with standard tints at the other. Print-out image of scene cf with standard tint; exposure time calculated from tables (missing)

Le Chronoscope PAP actinometer

Photographic Technology

1907-1917
Burton carbon print meter. Metal box with wooden paper holder. Lid carries 6 identical negatives under stop wedge.

Burton Carbon print meter

Photographic Technology

c. 1920
Actinometer in watch form. Very slim. With a solid nickel case. The Infallible Exposure Meter Company. 1914

Wynne's infalliable Hunter meter

Photographic Technology

1914
Haka expometer. Disc form actinometer, metal. Metal calculator rings and mask rotate over disc of sensitive paper, held by friction of emery paper stuck in back. In leather pouch.

Haka expometer

Photographic Technology
Wynne's Innfallible actinometer. Watch form actinometer, plain glass and mask with standard tint over paper disc. Cailbrated in German.

Wynne's Infallible actinometer

Photographic Technology

1900
Bookform actinic meter by Imperial Dry Plate Co., Cricklewood. No.1 bright light, No 2, dull light. Sliderule instruction calculators. Two instruction books and pack of sensitive.

Imperial exposure meter

Photographic Technology
Watkins Junior exposure meter. Cylindrical form actinometer, wooden paper holder under mask and blue glass, two rotating calculator rings, 1893.

Watkins Junior exposure meter

Photographic Technology
2 Watkins Bee meters, made by Alfred Watkins. Two actinometers watchform exposure meters in original box.

Two Watkins Bee meters

Photographic Technology
Special Akuret actinometer, made by Portable Studio Manufacturing Co, c.1900. Printing frame with 21 step wedge, in 3 rows. Used for carbon and platinotype process. Cost 3/6.

Special Akuret actinometer

Photographic Technology

1895-1905
Two hinged brass strips - one with small cylinder for sensitive paper and milled grooved, the other with circular aperture and standard tints (missing). For carbon printing.

Illingworth actinometer

Photographic Technology
Hodgkinson's actinometer, by J. Hicks of London, marked K.O.1

Hodgkinson's actinometer, by J. Hicks of London, m

Meteorology
Stanley actinometer. Small pillbox type actinometer for strip of sensitive paper. No calculator.

Stanley actinometer

Photographic Technology
Autotype disc actinometer.

actinometer

Photographic Technology

1910-1920
Watkins colour plate meter. Actinometer exposure meter, watchform. Calibrated for colour screen plates.

Watkins Colour Plate Meter

Photographic Technology
2 Herschel type actinometers, by Henry Barrow, London and 1848 and Thomas Charles Robinson, London, 1840

2 Herschel type actinometers, by Henry Barrow, Lon

Meteorology

1848; 1840
Watkin's Bee Meter. Watchform actinometer.

Watkins Bee Meter

Photographic Technology
Haka expometer. Disc form actinometer, metal. Metal calculator rings and mask rotate over disc of sensitive paper, held by friction of emery paper stuck in back.

Haka expometer

Photographic Technology
Watkins hand camera meter. Disc/cylinder form actinometer, blue glass and paper mask with standard tint cover roll of paper. Two concentric calculator scales, outer one rotating. Manufactured by Watkins Meter Co., Hereford.

Watkins hand camera actinometer

Photographic Technology
Hodgkinson's actinometer, marked K O no.2

Hodgkinson's actinometer, marked K O no.2

Meteorology
Wooden slide rule type calculator for exposure. Flat wooden plate marked with 3 scales. Speed 0.5-300. Exposure 0.005-60seconds. Lens f/2.8-64. Slide marked with weather: Very dull, dull, mean, bright, very bright. With speed index mark. Card insert carries time of day and year scale for North latitude 7 degrees and 30 foot. Hurter and Driffield. c.1898.

Hurter and Driffield actinograph 2nd model

Photographic Technology

1893-1903
Hodgkinson's actinometer, by J. Hicks of London, marked KO No.5

Hodgkinson's actinometer, by J. Hicks of London, m

Meteorology
Watkin's exposure meter (pocket watch style actinometer) in box with leaflets and tint plate dial.

Watkins "Bee" Exposure Meter

Photographic Technology

1910-1930
Watkin's Bee Meter. Watchform actinometer. In original box with instructions (12th edition)

Watkins Bee Meter

Photographic Technology
Bookform actinic meter by Imperial Dry Plate Co., Cricklewood. No.1 bright light, No 2, dull light.

Imperial exposure meter

Photographic Technology
Watkins Bee meter. Actinometer, watch form. In original carton with short instructions, booklets and speed card.

Watkins Bee Meter

Photographic Technology
Watkins actinometer. Watch-form actinometer, blue glass over mask with standard tint. Fixed calculator engraved on back plate.

Watkins actinometer

Photographic Technology
Watkins Bee meter. Actinometer, watch form.

Watkins Bee Meter

Photographic Technology
Watkins standard meter. Cylindrical form actinometer, end cap on chain forms 1 sec. period pendulum. Wooden paper holder at other end under mask with tint segment and blue glass. Three rotating calculator rings.

Watkin standard meter

Photographic Technology
Watkins Bee meter, made by Alfred Watkins. Actinometer, watchform exposure meter.

Watkins Bee meters

Photographic Technology
Watkins actinometer, watch-form. Sensitive paper under blue glass and mask with standard tint. Fixed calculator engraved on back plate.

Watkins actinometer

Photographic Technology
Watch pattern actinometer in original tin with instructions , Rapid Deadmatch paper.

Wynne's Infallible meter

Photographic Technology

1910
Two pairs of blackened & gilt spheres, Violle's actinometer, tested at Kew in 1889

Two pairs of blackened & gilt spheres, Violle's ac

Meteorology
Penrose Carbon Actinometer; step wedge numbered 1-10; provision for roll of paper.

Penrose carbon actinometer

Photographic Technology
Actinometer; 4 tints numbered 1, 0.5, 0.75, 0.25 round rectangular aperture; provision for paper roll; probably homemade.

Carbon tint actinometer

Photographic Technology
Watch form exposure meter. F/ scale 6-64. Time scale 1/2-64. Watkins.

Watkins actinometer

Photographic Technology