Central Scientific Mercury Barometer

Description
The Central Scientific Company, a major purveyor of apparatus for educational, industrial and scientific use, introduced a new mercury barometer in the early 1920s. Recognizing the flaws inherent in instruments in which the tube and scales were mounted on a wooden back, Central Scientific boasted that their Cenco-Improved barometer featured a tube “completely enclosed in hexagonal brass tubing, to which are attached the metric and British scales.” And, instead of the leather bag cistern found in most Fortin style barometers, Cenco’s new cistern was made of a plastic material that would not leak, and was designed so as to allow fine adjustment of the mercury level.
This example represents a further refinement of the form introduced in the late 1920s. It is marked “Central Scientific Co.” and “1,353,482” and “1,632,084.” New, it cost $35.
Ref: Central Scientific Company, Catalog F. Physical Apparatus and Instruments (Chicago, 1923), p. 43.
Central Scientific Company, Scientific Instruments, Laboratory Apparatus, and Supplies (Chicago, 1941), pp. 1152-1153.
Arndt M. Krause, "Mercurial Barometer," U.S. Patent 1,353,482 (1920).
Paul Klopsteg and Herman Paul Sachse, "Mercurial Barometer," U.S. Patent 1,632,084 (1927).
Location
Currently not on view
Object Name
barometer, mercury
date made
after 1927
maker
Central Scientific Company
place made
United States: Illinois, Chicago
ID Number
PH*316421
accession number
223721
catalog number
316421
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Barometers
Data Source
National Museum of American History, Kenneth E. Behring Center

Comments

Add a comment about this object