Richard Twort

Victorian Damp Meters

Negretti & Zambra Thermograph, Copper Lid

Numerous Makers, Negretti & Zambra, Wilson & Warden, Short & Mason etc c.1950

Remote Reading Thermograph by Jules Richard (Richard Freres), Paris

Self Recording Thermometer / Thermograph by Draper, New York

Thermograph by Jules Richard, Paris c.1925

Thermograph by Lawrence & Mayo, London c.1937

Thermograph by M Sendtner, Munchen c.1925

Thermograph by Negretti & Zambra, London For Instruments Ltd, Ottawa & Toronto Ci

Thermograph by Richard Freres, Paris c.1912

Thermograph by Short & Mason, London c.1950

Thermograph by Short & Mason, London c.1950

Thermograph World War 2 by Friez Instrument Division, Baltimore 1943

Campbell-Stokes Sunshine Recorder c.1900

Campbell-Stokes Sunshine Recorder by L Casella c.1900

Campbell-Stokes Sunshine Recorder by Negretti & Zambra

Campbell-Stokes Sunshine Recorder by Short & Mason c.1935

Campbell-Stokes Sunshine Recorder J Hicks c.1900

Campbell-Stokes Sunshine Recorder by Casella c.1935

Jordan’s Sunshine Recorder by Negretti & Zambra, London

Sunshine Recorder – Actinograph c.1950

Sunshine Recorder – Actinograph Fuess, Berlin

Sunshine Recorder – Actinograph RW Munro

Negretti & Zambra Hygrometer, England c.1925

Casella London Airflow Ref: 933 c.1974

Casella London Catalogue No. 633 c.1950

Casella London Catalogue 684 c.1948

Casella London Catalogue 877 c.1960

Casella London Catalogue c.1965

Casella London Humidity 1974

Casella London Rain, Dew & Evaporation 1974

Casella Meteorological Instruments Catalogue – Facsimile England c.1925

Darton & Co. Ltd, Watford Meteorological & Optical Instrument Makers 1963

Hezzanith 'Trade Name for Heath, Hick & Perken, London' Thermometrics, Meteorol

Hezzanith, London Trade Name for Heath, Hicks & Perken 1958

Negretti & Zambra London Meteorological Instruments

Negretti & Zambra London Standard Meteorological Instruments c.1930

Negretti & Zambra London Standard Meteorological Instruments

Barometer from Havana, Cuba c.1900

Mercury Barometer by R & J Beck, 68, Cornhill, London England c.1895