Hollow Glass Sphere with Brass Fittings
notes: label: Description
content: Rudolph Koenig referred to this hollow glass sphere with brass fittings as a “Bell suspended in a glass balloon, to show the enfeeblement of sound in a vacuum.” The phenomenon had been known since the first air pumps were made in the seventeenth century. This example came from the Smithsonian Instrument Room, and was probably purchased by Joseph Henry, the physicist who served as founding Secretary of the Institution.
label: Description
content: Ref: Rudolph Koenig, <i>Catalogue des Appareils d’Acoustique</i> (Paris, 1865), p. 13.
label: Description
content: Rudolph Koenig, <i>Catalogue des Appareils d’Acoustique</i> (Paris, 1889), p. 30.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.314586
label: catalog number
content: 314586
label: accession number
content: 205890
objectType: label: Object Name
content: pneumatic apparatus
physicalDescription: label: Measurements
content: overall: 13 in x 9 in; 33.02 cm x 22.86 cm
label: Measurements
content: overall: 13 in x 9 in; 33.02 cm x 22.86 cm