Beckmann thermometer
Date1880-1920
Inventory Number4425
ClassificationThermometer
Subject
Maker
Robert Bötze
Cultural Region
Place of Origin
Dimensions55.8 x 1.2 cm, 0.5 lb. (21 15/16 x 1/2 in., 0.2 kg)
case: 59.9 x 2.4 cm (23 9/16 x 15/16 in.)
case: 59.9 x 2.4 cm (23 9/16 x 15/16 in.)
Material
Accessoriesbrass cylindrical case with square flange near top
DescriptionA thermometer consisting of a glass tube with a mercury capillary enclosed in an outer glass vessel closed with a brass cap. The lower part of the thermometer that leads to the mercury bulb is thin and unmarked, with the upper section containing a milk glass scale calibrated from 0 to 5.4 degrees Celsius with a precision of 1/100 of a degree. The mercury capillary makes an S-bend near the top of the thermometer.
Signedmarked on back: F.O. Robert Bötze Leipzig
Inscribedon back: Beckmann'sches Thermometer 1/100° Celsius [and] Normalglas
FunctionThis is a thermometer that the user can fill with different amounts of mercury to use at different temperature ranges. It is very precise but because of this it has a narrow range of 5.4 degrees Celsius. To set it up for use, the thermometer would be placed in contact with a substance a few degrees above the upper required limit of temperature, and enough mercury would then be poured in so that the stem filled up to the s-bend. That way, the thermometer would have a range up to that temperature.
Bender und Hobein
Date: 1900-1930
Accessories: black cylindrical cardboard case with red inner surface (top missing)
Object number: 4433
Corning
Date: 1900-1920
Accessories: black cardboard case with green inner surface
Object number: 4406
Baudin
Date: circa 1876
Accessories: cylindrical brass case with square flange near top
Object number: 4426
American
Date: 1890-1910
Accessories: cylindrical cardboard case with green inner surface
Object number: 4438
Dr. H. Geissler, Nachfolger Franz Müller
Date: 1890-1920
Accessories: black cardboard case with green inner surface
Object number: 4399
Dr. H. Geissler, Nachfolger Franz Müller
Date: 1890-1910
Accessories: green cardboard case
Object number: 4389
Dr. H. Geissler, Nachfolger Franz Müller
Date: 1890-1920
Accessories: black cardboard case with red inner surface
Object number: 4397
Dr. H. Geissler, Nachfolger Franz Müller
Date: 1890-1920
Accessories: black cardboard case with marbled paper inner surface
Object number: 4407
German
Date: 1890-1920
Accessories: black cardboard case with red inner surface
Object number: 4398
Dr. H. Geissler, Nachfolger Franz Müller
Date: 1890-1920
Accessories: brass cap with knob at top; black cardboard case with red inner surface
Object number: 4400
Fritz Köhler
Date: 1900-1920
Accessories: black cylindrical cardboard case with red inner surface
Object number: 4435