Six maximum and minimum thermometer by J. Newman
1834-1857
Six's thermometer, 1876.
1876
Six's Self-Registering Maximum and Minimum Mercury Thermometer by Pastorelli & Co., 1875
1875
Modified Six’s thermometer by Negretti and Zambra, for taking temperatures at depth at sea, used aboard HMS Bulldog and HMS Porcupine
1855-1865
Six's thermometer, 1876.
1876
Miller-Casella thermometer for taking temperatures at depth at sea
1869
Miller-Casella thermometer for taking temperatures at depth at sea
1869-1872
Case for Miller-Casella thermometer for taking temperatures at depth at sea
1869
Six's thermometer
1876
James Six's maximum and minimum thermometer
1782
Six type maximum-minimum thermometer, British, 1986
1986