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Thermograph by Wilson, Warden of London, c.1950

1950

Thermograph by F. Darton & Co., London, England, 1

1900-1910

Kew wet bulb thermograph scale

Izuzu quartz precision thermograph

Paper Temperature Recorder, Galvanometer Type, 1901-22

1901-1922

Recording Vapour-pressure Thermometer, 1950-52

1950-1952

Aircraft thermograph, c. 1920, "Simplex" type.

1920

Thermograph used on 1901 Antarctic Expedition

1900-1901

Thermograph, bimetallic, incomplete (lacks clock and drum)

1910

Whitehouse experimental thermograph, c. 1872.

1872

Bimetallic Thermograph, 1901-1920

1901-1920
Original Callendar electrical temperature recorder (including integrator) in wooden case, 1897.

Callendar Temperature Recorder, 1897

1897
Clearspan P100L single pen temperature recorder with spare chart and accessories, 1970-78. Calibrated to use copper constantin thermocouple.

Single-Pen Electrical Temperature Recorder, 1970-78

1970-1978
Thermograph scale, for Kew, dry bulb, MO 533

Thermograph scale, for Kew, dry bulb, MO 533

Thermograph scale, for Kew, [wet] bulb, MO 533

Thermograph scale, for Kew, [wet] bulb, MO 533

Single thread electrical temperature recorder in glazed case, by The Cambridge Scientific Instrument Company Ltd., Cambridge, England, 1910-14. Range say 0-1000°C, with 100 charts

Single Thread Temperature Recorder, 1910-14

1910-1914
Photothermograph commissioned by the Meteorological Committee of the Royal Society, some design specifications attributed to Francis Ronalds, made in England, UK, 1867. Installed and operated at Radcliffe Observatory, Oxford.

Photothermograph used at Radcliffe Observatory, Oxford

1867