Modified Six’s thermometer by Negretti and Zambra, for taking temperatures at depth at sea, used aboard HMS Bulldog and HMS Porcupine 1855-1865
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, 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, 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, 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
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
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