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Rutherford maximum and minimum thermometer, 1794

Rutherford maximum and minimum thermometer, 1794

1794

Diplex maximum and minimum thermometer, British, 1986

Diplex maximum and minimum thermometer, British, 1986

1986

Modified Six’s thermometer by Negretti and Zambra, for taking temperatures at depth at sea, used aboard HMS Bulldog and HMS Porcupine

Modified Six’s thermometer by Negretti and Zambra, for taking temperatures at depth at sea, used aboard HMS Bulldog and HMS Porcupine

1855-1865

Dring & Fage patent maximum and minimum thermometer, 1865-1875

Dring & Fage patent maximum and minimum thermometer, 1865-1875

1865-1875

Six type thermometer in plastic case

Six type thermometer in plastic case

1970-1979

Maximum & minimum fahrenheit thermometer, 1818-1825

Maximum & minimum fahrenheit thermometer, 1818-1825

1818-1825

Six type maximum and minimum thermometer, 1985

Six type maximum and minimum thermometer, 1985

1985

Six type maximum-minimum thermometer, British, 1986

Six type maximum-minimum thermometer, British, 1986

1986

Six type maximum-minimum thermometer, in plastic frame (Casella Product No. CE 003), Casella (London) Ltd, UK, 1986.

Six type maximum-minimum thermometer, British, 1986

1986

Earth thermometer, maximum and minimum, mercury and alcohol-in-glass, fahrenheit, tube bent 8 inches above bulb. Made by C.F. Casella and Co. Ltd, London. Marked MO 18203, 8974 and NPL25 certified in 1925. Min scale 20 to 125, max scale 15 to 100

Earth thermometer

Earth thermometer, alcohol and mercury-in-glass, fahrenheit, maximum & minimum, Six's type, unsigned but initialled G. H. Zeal Ltd.. Tube bent to less than right angle, with horizontal Six's thermometer. Marked 2147. [Date 1950s]. Scale 20 to 120

Earth thermometer

1950-1959

Earth thermometer, alcohol and mercury-in-glass, fahrenheit, maximum & minium, Six's type, unsigned but initialled G. H. Zeal Ltd.. Tube bent to less than right angle, with horizontal Six's thermometer. Marked 2148. [Date 1950s]. Scale 20 to 120

Earth thermometer

1950-1959

Earth thermometer, Six's, maximum and minimum, fahrenheit, alcohol and mercury-in-glass, made by G. H. Zeal Ltd., London. Tube bent to form angle less than right angle with Six's thermometr. Marked D.D.B. 9842. Scale 20 to 120. [Date 1950s]

Earth thermometer

Earth thermometer, Six's, maximum and minimum, alcohol and mercury-in-glass, fahrenheit, made by G. H. Zeal Ltd., England. Tube bent at right angles to Six's thermometer. Marked Ref No MET 1607, MO 24833/68. Dated 1968. Scale 20 to 120

Earth thermometer

1968

Earth thermometer, Six's, maximum and minimum, spirit and mercury-in-glass, centigrade, by G. H. Zeal Ltd., England. Marked Ref No 21430, MO 26440/72. Tube bent at near right angle, fixed to horizontal Six's thermometer. Dated 1972. Scale -7 to 38

Earth thermometer

1972

Earth thermometer, Six's, maximum and minium, mercury and alcohol-in-glass, fahrenheit, made by G. H. Zeal Ltd., England. Tube bent at right angles, with Six's thermometer horizontal. Marked Ref No Met 1614, MO24875/68. Dated 1968. Scale 20 to 120

Earth thermometer

1968

Earth thermometer, maximum and minium, mercury and alcohol-in-glass fahrenheit, by Negretti & Zambra, London. Marked MO 18202, N & Z, NPL25-26. Certified in 1925-26. Scale 20 to 100

Earth thermometer

1925

'Diplex' maximum and minimum thermometer, fitted with remote temperature probe, Casella (London) Ltd, England, 1986

Diplex maximum and minimum thermometer, British, 1986

1986