volume dilatometer
Date1890-1930
Inventory Number4838
ClassificationChemistry Apparatus
Subject
Maker
E. Leybold Nachfolger
1870 - 1967
Cultural Region
Place of Origin
Dimensions22.3 x 5.4 x 2.6 cm (8 3/4 x 2 1/8 x 1 in.)
Material
DescriptionGraduated glass cylinder with a reservoir at the bottom.
The cylinder is graduated in increments of 1 degree Celsius, with larger tick marks at increments of 5 degrees and numbered at increments of 10 degrees. The digits are upside-down and opposite one another on the scale with the tick marks in between. The scale begins at the glass bulb. The first tick mark is 11 increments down from the first number, which is 10, which will hereafter be referred to as negative 10 for the sake of convenience. The next increment is 00, the next is positive 10, then 20, and so on to 50, after which is one additional tick mark.
Inside the cylinder are two tubes, one of which is a thermometer filled with mercury up to the 13th tick mark after 0. The mercury column starts at a bulb inside the reservoir. The other tube is empty and connects the inside of the glass reservoir to the outside air. The tube is connected to the reservoir through a small hole in the glass bulb
The reservoir is attached to the graduated cylinder with a metal collar, but it only connects to one of the two tubes--the empty one--through a small hole. A side neck provides a second connection to the outside of the cylinder.
On the other end of the graduated cylinder is a brass cap with a ridged edge. A rubber stopper is fastened over the empty tube.
The cylinder is graduated in increments of 1 degree Celsius, with larger tick marks at increments of 5 degrees and numbered at increments of 10 degrees. The digits are upside-down and opposite one another on the scale with the tick marks in between. The scale begins at the glass bulb. The first tick mark is 11 increments down from the first number, which is 10, which will hereafter be referred to as negative 10 for the sake of convenience. The next increment is 00, the next is positive 10, then 20, and so on to 50, after which is one additional tick mark.
Inside the cylinder are two tubes, one of which is a thermometer filled with mercury up to the 13th tick mark after 0. The mercury column starts at a bulb inside the reservoir. The other tube is empty and connects the inside of the glass reservoir to the outside air. The tube is connected to the reservoir through a small hole in the glass bulb
The reservoir is attached to the graduated cylinder with a metal collar, but it only connects to one of the two tubes--the empty one--through a small hole. A side neck provides a second connection to the outside of the cylinder.
On the other end of the graduated cylinder is a brass cap with a ridged edge. A rubber stopper is fastened over the empty tube.
Signedon paper label: E. LEYBOLD's Nachf. A.-G. Köln a. Rh. 2500
Curatorial RemarksThis instrument still has mercury inside.
FunctionTo measure the maximum density of water. The reservoir is filled with water and is then immersed in a water bath. The water expands up the empty tube. Meanwhile, the thermometer (another form of volume dilatometer) measures the temperature of the water in the reservoir. The instrument is designed for use with a projection apparatus.
Western Electric Company
Date: before 1933
Accessories: cords missing
Object number: RS0153
E. Malligand Fils
Date: circa 1875
Accessories: short cylindrical spirit burner with cap for wick
Object number: DW0889
Hellige, Inc.
Date: 1949-1960
Accessories: wooden box
flexible black rubber tube with rigid white plastic connector at one end and a bulb-shaped glass chamber at the other end
metal pin with hardened red-rubber cap
Object number: 2003-1-0093
Cambridge Instrument Company, Inc.
Date: circa 1940
Object number: 1996-1-0304
American
Date: early 20th-mid 20th Century
Object number: WJ0627
Todd Scientific Company
Date: 1955-1965
Object number: 1996-1-0396
Baudin
Date: 1875-1920
Accessories: spring coiled around base of tube
Object number: 1998-1-1253
See also/See also
