Six's maximum and minimum thermometer
1780
1780
1780
1780
1780
1780
1780
1780
1780
1780
1780
1780
1780
1970-1985
1780
1780
1780
1780
1830
1830
1960-10-05
1780
1800-1899
1811-1812
1780
1780
1780
1780
1780
1780
1942
1782
1780
1830
1725-1735
1830-05-03
1846