Vibration Microscope
name: label: Maker
content: Rudolph Koenig
notes: label: Description
content: The vibration microscope (or optical comparator) was used to calibrate the frequency of a tuning fork in terms of a fork of known frequency. Hermann von Helmholtz invented the form; Jules Antoine Lissajous introduced that in which the reference fork is driven electromagnetically. This electromagnetic example is inscribed “Rudolph Koenig a Paris” and was used at the U.S. Military Academy at West Point.
label: Description
content: Ref: Rudolph Koenig, <i>Catalogue des Appareils d’Acoustique</i> (Paris, 1865), p. 12.
label: Description
content: Rudolph Koenig, <i>Catalogue des Appareils d’Acoustique</i> (Paris, 1889), p. 83.
label: Location
content: Currently not on view
place: label: place made
content: France: Île-de-France, Paris
setName: label: See more items in
content: Medicine and Science: Physical Sciences
creditLine: label: Credit Line
content: United States Military Academy
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.315724
label: accession number
content: 217544
label: catalog number
content: 315724
objectType: label: Object Name
content: optical comparator
physicalDescription: label: Measurements
content: overall: 17 1/8 in x 9 1/2 in x 9 1/2 in; 43.4975 cm x 24.13 cm x 24.13 cm