Standard mercury thermometer, one of eight, reading -30º to 360ºC, by W. Haak, Neuhaus am Rennweg, Thuringia, Germany, 1876. Standard Mercury Thermometer, 1876 1876
Standard mercury thermometer, one of eight, reading -30º to 360ºC by W. Haak, Thuringia, Germany, 1876. Fitted with a dark blue cap and ring. Standard Mercury Thermometer, 1876 1876
Standard mercury thermometer, one of eight, reading -30º to 360ºC by W. Haak, Thuringia, Germany, 1876. Fitted with dark blue cap with ring. Standard Mercury Thermometer, 1876 1876
Mercury thermometer, one of eight, reading 80º to 360ºC by W. Haak, Thuringia, Germany, 1876. Fitted with a dark blue cap and ring. Standard Mercury Thermometer, 1876 1876
Standard mercury thermometer, one of eight, reading -20º to 150ºC by W. Haak, Thuringia, Germany, 1876. Fitted with a sky-blue cap with ring. Standard Mercury Thermometer, 1876 1876
Standard mercury thermometer, one of eight, reading 74º to 360ºC by W. Haak, Thuringia, Germany, 1876. Standard Mercury Thermometer, 1876 1876
Morocco leather case for eight mercury thermometers by W. Haak, Thuringia, Germany, 1876. Morocco leather case for eight mercury thermometers by W. Haak 1876
Standard mercury thermometer, one of eight, reading -20º to 160ºC by W. Haak, Thuringia, Germany, 1876. Fitted with a sky-blue cap with ring. Standard Mercury Thermometer, 1876 1876
Standard mercury thermometer, one of eight, reading -10º to 360ºC by W. Haak, Thuringia, Germany, 1876. Fitted with a dark blue cap and ring. Standard Mercury Thermometer, 1876 1876