measurer for Volta-type eudiometer
Date1790-1825
Inventory Number0033b
ClassificationEudiometer
Subject
Maker
English
?
Cultural Region
Dimensions11.5 x 9.3 x 3.6 cm (4 1/2 x 3 11/16 x 1 7/16 in.)
Material
Bibliography
DescriptionGlass tube sealed at one end. Brass mounting at other end equipped with sliding plate that opens or closes tube.
Signedunsigned
FunctionEarly eudiometers measured only the approximate volume of gases. This measurer, part of a more sophisticated apparatus, invented by Volta, was more accurate. Both the measurer's tube and the cylinder were filled with a liquid, usually mercury or water, and inverted in a pneumatic through like any other eudiometer. But in this instrument specific quantities of different gases were introduced directly into the cylinder from the small measuring device. The reaction, touched off by an electric spark, occurred in the heavy glass cylinder. When the stopcock was opened, the residue rose into the upper tube whose small diameter and accurate calibration enabled the experimenter to make very precise measurements.
English
Date: circa 1785
Accessories: comes with a clamp (object 0028b)
Object number: 0028a
See also/See also
